diff --git a/basic_machines/autocrafter.lua b/basic_machines/autocrafter.lua
index 92d81ea..d831708 100644
--- a/basic_machines/autocrafter.lua
+++ b/basic_machines/autocrafter.lua
@@ -47,7 +47,7 @@ local function formspec(self, pos, nvm)
 		"listring[current_player;main]"..
 		"listring[context;dst]" ..
 		"listring[current_player;main]"..
-		default.get_hotbar_bg(0, 4)
+		default.get_hotbar_bg(0, 5.4)
 end
 
 local function count_index(invlist)
diff --git a/basic_machines/chest.lua b/basic_machines/chest.lua
index 8d72405..a7f4ca6 100644
--- a/basic_machines/chest.lua
+++ b/basic_machines/chest.lua
@@ -16,6 +16,9 @@
 local M = minetest.get_meta
 local S = techage.S
 
+local MP = minetest.get_modpath(minetest.get_current_modname())
+local mConf = dofile(MP.."/basis/conf_inv.lua")
+
 local function allow_metadata_inventory_put(pos, listname, index, stack, player)
 	if minetest.is_protected(pos, player:get_player_name()) then
 		return 0
@@ -145,17 +148,95 @@ minetest.register_node("techage:chest_ta3", {
 	sounds = default.node_sound_wood_defaults(),
 })
 
-local function formspec4()
+techage.register_node({"techage:chest_ta2", "techage:chest_ta3"}, {
+	on_pull_item = function(pos, in_dir, num, item_name)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		return techage.get_items(pos, inv, "main", num)
+	end,
+	on_push_item = function(pos, in_dir, stack)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		return techage.put_items(inv, "main", stack)
+	end,
+	on_unpull_item = function(pos, in_dir, stack)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		return techage.put_items(inv, "main", stack)
+	end,
+	on_recv_message = function(pos, src, topic, payload)
+		if topic == "state" then
+			local meta = minetest.get_meta(pos)
+			local inv = meta:get_inventory()
+			return techage.get_inv_state(inv, "main")
+		else
+			return "unsupported"
+		end
+	end,
+})	
+
+
+local function formspec4(pos)
 	return "size[10,9]"..
+	"tabheader[0,0;tab;"..S("Inventory,Configuration")..";1;;true]"..
 	default.gui_bg..
 	default.gui_bg_img..
 	default.gui_slots..
 	"list[context;main;0,0;10,5;]"..
+	mConf.preassigned_stacks(pos, 10, 5)..
 	"list[current_player;main;1,5.3;8,4;]"..
 	"listring[context;main]"..
 	"listring[current_player;main]"
 end
 
+local function formspec4_cfg(pos)
+	return "size[10,9]"..
+	"tabheader[0,0;tab;"..S("Inventory,Configuration")..";2;;true]"..
+	default.gui_bg..
+	default.gui_bg_img..
+	default.gui_slots..
+	"list[context;conf;0,0;10,5;]"..
+	"list[current_player;main;1,5.3;8,4;]"..
+	"listring[context;conf]"..
+	"listring[current_player;main]"
+end
+
+local function ta4_allow_metadata_inventory_put(pos, listname, index, stack, player)
+	if minetest.is_protected(pos, player:get_player_name()) then
+		return 0
+	end
+	
+	if listname == "main" then
+		return stack:get_count()
+	else
+		return mConf.allow_conf_inv_put(pos, listname, index, stack, player)
+	end
+end
+
+local function ta4_allow_metadata_inventory_take(pos, listname, index, stack, player)
+	if minetest.is_protected(pos, player:get_player_name()) then
+		return 0
+	end
+	
+	if listname == "main" then
+		return stack:get_count()
+	else
+		return mConf.allow_conf_inv_take(pos, listname, index, stack, player)
+	end
+end
+
+local function ta4_allow_metadata_inventory_move(pos, from_list, from_index, to_list, to_index, count, player)
+	if minetest.is_protected(pos, player:get_player_name()) then
+		return 0
+	end
+	
+	if from_list == "main" then
+		return count
+	else
+		return mConf.allow_conf_inv_move(pos, from_list, from_index, to_list, to_index, count, player)
+	end
+end
+
 minetest.register_node("techage:chest_ta4", {
 	description = S("TA4 Protected Chest"),
 	tiles = {
@@ -172,6 +253,7 @@ minetest.register_node("techage:chest_ta4", {
 		local meta = minetest.get_meta(pos)
 		local inv = meta:get_inventory()
 		inv:set_size('main', 50)
+		inv:set_size('conf', 50)
 	end,
 	
 	after_place_node = function(pos, placer)
@@ -179,18 +261,36 @@ minetest.register_node("techage:chest_ta4", {
 		local number = techage.add_node(pos, "techage:chest_ta4")
 		meta:set_string("node_number", number)
 		meta:set_string("owner", placer:get_player_name())
-		meta:set_string("formspec", formspec4())
+		meta:set_string("formspec", formspec4(pos))
 		meta:set_string("infotext", S("TA4 Protected Chest").." "..number)
 	end,
 
+	on_receive_fields = function(pos, formname, fields, player)
+		if minetest.is_protected(pos, player:get_player_name()) then
+			return
+		end
+		
+		local meta = minetest.get_meta(pos)
+		local mem = techage.get_mem(pos)
+		if fields.tab == "1" then
+			mem.filter = nil
+			meta:set_string("formspec", formspec4(pos))
+		elseif fields.tab == "2" then
+			meta:set_string("formspec", formspec4_cfg(pos))
+		elseif fields.quit == "true" then
+			mem.filter = nil
+		end
+	end,
+	
 	techage_set_numbers = function(pos, numbers, player_name)
 		return techage.logic.set_numbers(pos, numbers, player_name, S("TA4 Protected Chest"))
 	end,
 	
 	can_dig = can_dig,
 	after_dig_node = after_dig_node,
-	allow_metadata_inventory_put = allow_metadata_inventory_put,
-	allow_metadata_inventory_take = allow_metadata_inventory_take,
+	allow_metadata_inventory_put = ta4_allow_metadata_inventory_put,
+	allow_metadata_inventory_take = ta4_allow_metadata_inventory_take,
+	allow_metadata_inventory_move = ta4_allow_metadata_inventory_move,
 
 	paramtype2 = "facedir",
 	groups = {choppy=2, cracky=2, crumbly=2},
@@ -198,28 +298,68 @@ minetest.register_node("techage:chest_ta4", {
 	sounds = default.node_sound_wood_defaults(),
 })
 
-techage.register_node({"techage:chest_ta2", "techage:chest_ta3", "techage:chest_ta4"}, {
+
+techage.register_node({"techage:chest_ta4"}, {
 	on_pull_item = function(pos, in_dir, num, item_name)
 		local meta = minetest.get_meta(pos)
 		local inv = meta:get_inventory()
-		if item_name and inv:get_size("main") == 50 then -- TA4 chest?
-			local taken = inv:remove_item("main", {name = item_name, count = num})
-			if taken:get_count() > 0 then
-				return taken
+		local mem = techage.get_mem(pos)
+		mem.filter = mem.filter or mConf.item_filter(pos, 50)
+		mem.chest_configured = mem.chest_configured or #mem.filter["unconfigured"] < 50
+		
+		if inv:is_empty("main") then
+			return nil
+		end
+		
+		if item_name then
+			if mem.filter[item_name] then -- configured item
+				local taken = inv:remove_item("main", {name = item_name, count = num})
+				if taken:get_count() > 0 then
+					return taken
+				end
+			elseif not mem.chest_configured then
+				local taken = inv:remove_item("main", {name = item_name, count = num})
+				if taken:get_count() > 0 then
+					return taken
+				end
+			end
+		else -- no item given
+			if mem.chest_configured then
+				return mConf.take_item(pos, inv, "main", num, mem.filter["unconfigured"] or {})
+			else
+				return techage.get_items(pos, inv, "main", num)
 			end
-		else
-			return techage.get_items(pos, inv, "main", num)
 		end
 	end,
-	on_push_item = function(pos, in_dir, stack)
+	on_push_item = function(pos, in_dir, item, idx)
 		local meta = minetest.get_meta(pos)
 		local inv = meta:get_inventory()
-		return techage.put_items(inv, "main", stack)
+		local mem = techage.get_mem(pos)
+		mem.filter = mem.filter or mConf.item_filter(pos, 50)
+		mem.chest_configured = mem.chest_configured or #mem.filter["unconfigured"] < 50
+		
+		if mem.chest_configured then
+			local name = item:get_name()
+			local stacks = mem.filter[name] or mem.filter["unconfigured"]
+			return mConf.put_items(pos, inv, "main", item, stacks, idx)
+		else
+			return techage.put_items(inv, "main", item, idx)
+		end
 	end,
 	on_unpull_item = function(pos, in_dir, stack)
 		local meta = minetest.get_meta(pos)
 		local inv = meta:get_inventory()
-		return techage.put_items(inv, "main", stack)
+		local mem = techage.get_mem(pos)
+		mem.filter = mem.filter or mConf.item_filter(pos, 50)
+		mem.chest_configured = mem.chest_configured or #mem.filter["unconfigured"] < 50
+		
+		if mem.chest_configured then
+			local name = item:get_name()
+			local stacks = mem.filter[name] or mem.filter["unconfigured"]
+			return mConf.put_items(pos, inv, "main", item, stacks)
+		else
+			return techage.put_items(inv, "main", item)
+		end
 	end,
 	
 	on_recv_message = function(pos, src, topic, payload)
diff --git a/basic_machines/consumer.lua b/basic_machines/consumer.lua
index 31483bc..eee6225 100644
--- a/basic_machines/consumer.lua
+++ b/basic_machines/consumer.lua
@@ -219,7 +219,7 @@ function techage.register_consumer(base_name, inv_name, tiles, tNode, validState
 				selection_box = tNode.selection_box,
 
 				can_dig = tNode.can_dig,
-				on_rotate = screwdriver.disallow,
+				on_rotate = tNode.on_rotate or screwdriver.disallow,
 				on_timer = node_timer,
 				on_receive_fields = tNode.on_receive_fields,
 				on_rightclick = tNode.on_rightclick,
@@ -251,7 +251,7 @@ function techage.register_consumer(base_name, inv_name, tiles, tNode, validState
 				node_box = tNode.node_box,
 				selection_box = tNode.selection_box,
 				
-				on_rotate = screwdriver.disallow,
+				on_rotate = tNode.on_rotate or screwdriver.disallow,
 				on_timer = node_timer,
 				on_receive_fields = tNode.on_receive_fields,
 				on_rightclick = tNode.on_rightclick,
diff --git a/basic_machines/distributor.lua b/basic_machines/distributor.lua
index f25cf02..e822487 100644
--- a/basic_machines/distributor.lua
+++ b/basic_machines/distributor.lua
@@ -41,8 +41,6 @@ local function filter_settings(pos)
 	local filter = minetest.deserialize(meta:get_string("filter")) or {false,false,false,false}
 	local ItemFilter = {}  -- {<item:name> = {dir,...}]
 	local OpenPorts = {}  -- {dir, ...}
-	local FilterItems = {} -- {<item:name>, <item:name>, ...}  for sequencing only
-	local FilterItemIdx = {} -- {<item:name> = <slot-idx>, <item:name> = <slot-idx>, ...}  for sequencing only
 	-- collect all filter settings
 	for idx,slot in ipairs(SlotColors) do
 		if filter[idx] == true then
@@ -58,8 +56,6 @@ local function filter_settings(pos)
 							ItemFilter[name] = {}
 						end
 						table.insert(ItemFilter[name], out_dir)
-						table.insert(FilterItems, name)
-						FilterItemIdx[name] = idx2
 					end
 				end
 			end
@@ -69,8 +65,6 @@ local function filter_settings(pos)
 	FilterCache[minetest.hash_node_position(pos)] = {
 		ItemFilter = ItemFilter, 
 		OpenPorts = OpenPorts,
-		FilterItems = FilterItems,
-		FilterItemIdx = FilterItemIdx,
 	}
 end
 
@@ -82,40 +76,13 @@ local function get_filter_settings(pos)
 --		["default:cobble"] = {4},
 --	}
 --	local OpenPorts = {3}
---  local FilterItems = {"default:dirt",...}
---	return ItemFilter, OpenPorts, FilterItems
+--	return ItemFilter, OpenPorts
 	
 	local hash = minetest.hash_node_position(pos)
 	if FilterCache[hash] == nil then
 		filter_settings(pos)
 	end
-	return FilterCache[hash].ItemFilter, FilterCache[hash].OpenPorts, FilterCache[hash].FilterItems
-end
-
-local function get_slot_index(pos, name)
-	local hash = minetest.hash_node_position(pos)
-	if FilterCache[hash] == nil then
-		filter_settings(pos)
-	end
-	return FilterCache[hash].FilterItemIdx[name]
-end
-
-local function order_checkbox(pos, filter)
-	local cnt = 0
-	
-	if CRD(pos).stage == 2 then return "" end
-	
-	for _,val in ipairs(filter) do
-		if val then cnt = cnt + 1 end
-	end
-	if cnt == 1 then
-		local order = M(pos):get_int("order") == 1 and "true" or "false"	
-		return "checkbox[2,0;order;1:1;"..order.."]"..
-			"tooltip[2,0;1,1;"..S("Force order of filter items")..";#0C3D32;#FFFFFF]"
-	else
-		M(pos):set_int("order", 0) -- disable sequencing
-	end
-	return ""
+	return FilterCache[hash].ItemFilter, FilterCache[hash].OpenPorts
 end
 
 local function blocking_checkbox(pos, filter)
@@ -127,8 +94,8 @@ local function blocking_checkbox(pos, filter)
 	end
 	if cnt > 1 and #open_ports > 0 then
 		local blocking = M(pos):get_int("blocking") == 1 and "true" or "false"
-		return "checkbox[2,0;blocking;>>|;"..blocking.."]"..
-			"tooltip[2,0;1,1;"..S("Block configured items for open ports")..";#0C3D32;#FFFFFF]"
+		return "checkbox[3,3.9;blocking;"..S("blocking mode")..";"..blocking.."]"..
+			"tooltip[3,3.9;1,1;"..S("Block configured items for open ports")..";#0C3D32;#FFFFFF]"
 	else
 		M(pos):set_int("blocking", 0) -- disable blocking
 	end
@@ -137,18 +104,16 @@ end
 		
 local function formspec(self, pos, nvm)
 	local filter = minetest.deserialize(M(pos):get_string("filter")) or {false,false,false,false}
-	local order = order_checkbox(pos, filter)
 	local blocking = blocking_checkbox(pos, filter)
 	return "size[10.5,8.5]"..
 	default.gui_bg..
 	default.gui_bg_img..
 	default.gui_slots..
 	"list[context;src;0,0;2,4;]"..
-	order..
 	blocking..
 	"image[2,1.5;1,1;techage_form_arrow.png]"..
-	"image_button[2,3;1,1;"..self:get_state_button_image(nvm)..";state_button;]"..
-	"tooltip[2,3;1,1;"..self:get_state_tooltip(nvm).."]"..
+	"image_button[0,4.8;1,1;"..self:get_state_button_image(nvm)..";state_button;]"..
+	"tooltip[0,4.8;1,1;"..self:get_state_tooltip(nvm).."]"..
 	"checkbox[3,0;filter1;On;"..dump(filter[1]).."]"..
 	"checkbox[3,1;filter2;On;"..dump(filter[2]).."]"..
 	"checkbox[3,2;filter3;On;"..dump(filter[3]).."]"..
@@ -161,10 +126,10 @@ local function formspec(self, pos, nvm)
 	"list[context;green;4.5,1;6,1;]"..
 	"list[context;blue;4.5,2;6,1;]"..
 	"list[context;yellow;4.5,3;6,1;]"..
-	"list[current_player;main;1.25,4.5;8,4;]"..
+	"list[current_player;main;1.25,4.8;8,4;]"..
 	"listring[context;src]"..
 	"listring[current_player;main]"..
-	default.get_hotbar_bg(1.25,4.5)
+	default.get_hotbar_bg(1.25,4.8)
 end
 
 local function allow_metadata_inventory_put(pos, listname, index, stack, player)
@@ -284,41 +249,7 @@ local function distributing(pos, inv, crd, nvm)
 	if num_pushed == 0 then
 		crd.State:blocked(pos, nvm)
 	else
-		crd.State:keep_running(pos, nvm, COUNTDOWN_TICKS, sum_num_pushed)
-	end
-end
-
-local function sequencing(pos, inv, crd, nvm)
-	local _,open_ports, filter_items = get_filter_settings(pos)
-	local offs = nvm.last_index or 1
-	local num_filters = 0 -- already processed
-	local num_pushed = 0
-	local push_dir = open_ports[1] or 1
-	local blocked = true
-	
-	while num_pushed < crd.num_items and num_filters < 7 do
-		local stack = filter_items[offs] and ItemStack(filter_items[offs])
-		if stack then
-			if not inv:contains_item("src", stack) then
-				break
-			end
-			if techage.push_items(pos, push_dir, stack, offs) then
-				num_pushed = num_pushed + 1
-				inv:remove_item("src", stack)
-				blocked = false
-			end
-		end
-		offs = (offs % 6) + 1
-		num_filters = num_filters + 1
-	end
-	
-	nvm.last_index = offs
-	if blocked then
-		crd.State:blocked(pos, nvm)
-	elseif num_pushed == 0 then
-		crd.State:standby(pos, nvm)
-	else
-		crd.State:keep_running(pos, nvm, COUNTDOWN_TICKS, num_pushed)
+		crd.State:keep_running(pos, nvm, COUNTDOWN_TICKS)
 	end
 end
 
@@ -329,11 +260,7 @@ local function keep_running(pos, elapsed)
 	local crd = CRD(pos)
 	local inv = M(pos):get_inventory()
 	if not inv:is_empty("src") then
-		if M(pos):get_int("order") == 1 then
-			sequencing(pos, inv, crd, nvm)
-		else
-			distributing(pos, inv, crd, nvm)
-		end
+		distributing(pos, inv, crd, nvm)
 	else
 		crd.State:idle(pos, nvm)
 	end
@@ -355,10 +282,6 @@ local function on_receive_fields(pos, formname, fields, player)
 		filter[3] = fields.filter3 == "true"
 	elseif fields.filter4 ~= nil then
 		filter[4] = fields.filter4 == "true"
-	elseif fields.order ~= nil and CRD(pos).stage > 2 then
-		meta:set_int("order", fields.order == "true" and 1 or 0)
-		local nvm = techage.get_nvm(pos)
-		nvm.last_index = 1 -- start from the beginning
 	elseif fields.blocking ~= nil then
 		meta:set_int("blocking", fields.blocking == "true" and 1 or 0)
 	end
@@ -431,26 +354,6 @@ tiles.act = {
 	"techage_filling_ta#.png^techage_frame_ta#.png^techage_appl_distri_blue.png",
 }
 
-local function put_items(pos, item)
-	local order = M(pos):get_int("order") == 1
-	local inv = M(pos):get_inventory()
-	if order then
-		local name = item:get_name()
-		local idx = get_slot_index(pos, name)
-		if idx then
-			local stack = inv:get_stack("src", idx)
-			if stack:item_fits(item) then
-				stack:add_item(item)
-				inv:set_stack("src", idx, stack)
-				return true
-			end
-		end
-		return false
-	else
-		return techage.put_items(inv, "src", item)
-	end
-end
-
 local tubing = {
 	on_pull_item = function(pos, in_dir, num)
 		local inv = M(pos):get_inventory()
@@ -458,10 +361,12 @@ local tubing = {
 	end,
 	on_push_item = function(pos, in_dir, stack)
 		CRD(pos).State:start_if_standby(pos)
-		return put_items(pos, stack)
+		local inv = M(pos):get_inventory()
+		return techage.put_items(inv, "src", stack)
 	end,
 	on_unpull_item = function(pos, in_dir, stack)
-		return put_items(pos, stack)
+		local inv = M(pos):get_inventory()
+		return techage.put_items(inv, "src", stack)
 	end,
 	on_recv_message = function(pos, src, topic, payload)
 		if topic == "info" then
@@ -528,7 +433,7 @@ local node_name_ta2, node_name_ta3, node_name_ta4 =
 		
 		groups = {choppy=2, cracky=2, crumbly=2},
 		sounds = default.node_sound_wood_defaults(),
-		num_items = {0,4,12,36},
+		num_items = {0,4,12,24},
 	})
 
 minetest.register_craft({
diff --git a/basic_machines/electronic_fab.lua b/basic_machines/electronic_fab.lua
index b97eae5..60665dd 100644
--- a/basic_machines/electronic_fab.lua
+++ b/basic_machines/electronic_fab.lua
@@ -219,7 +219,7 @@ local node_name_ta2, node_name_ta3, node_name_ta4 =
 		groups = {choppy=2, cracky=2, crumbly=2},
 		sounds = default.node_sound_wood_defaults(),
 		num_items = {0,1,1,1},
-		power_consumption = {0,8,12,18},
+		power_consumption = {0,8,12,12},
 	},
 	{false, true, true, true})  -- TA2/TA3/TA4
 
diff --git a/basic_machines/pusher.lua b/basic_machines/pusher.lua
index eb31707..fc68f4f 100644
--- a/basic_machines/pusher.lua
+++ b/basic_machines/pusher.lua
@@ -42,7 +42,7 @@ local function ta4_formspec(self, pos, nvm)
 			"box[0,-0.1;7.8,0.5;#c6e8ff]"..
 			"label[3,-0.1;"..minetest.colorize("#000000", S("Pusher")).."]"..
 			techage.question_mark_help(8, S("Optionally configure\nthe pusher with one item"))..
-			"list[context;main;3.5,1;1,1;]"..
+			"list[context;main;3.5,0.8;1,1;]"..
 			"image_button[3.5,2;1,1;".. self:get_state_button_image(nvm) ..";state_button;]"..
 			"tooltip[3.5,2;1,1;"..self:get_state_tooltip(nvm).."]"..
 			"list[current_player;main;0,3.5;8,4;]"..
diff --git a/basic_machines/quarry.lua b/basic_machines/quarry.lua
index 2822ef6..8ee6893 100644
--- a/basic_machines/quarry.lua
+++ b/basic_machines/quarry.lua
@@ -205,7 +205,7 @@ local function quarry_task(pos, crd, nvm)
 					if item_name then
 						if add_to_inv(pos, item_name) then
 							minetest.remove_node(qpos)
-							crd.State:keep_running(pos, nvm, COUNTDOWN_TICKS, 1)
+							crd.State:keep_running(pos, nvm, COUNTDOWN_TICKS)
 						else
 							crd.State:blocked(pos, nvm, S("inventory full"))
 						end
diff --git a/basic_machines/ta4_chest.lua b/basic_machines/ta4_chest.lua
index 44e3ee6..5c77176 100644
--- a/basic_machines/ta4_chest.lua
+++ b/basic_machines/ta4_chest.lua
@@ -157,6 +157,22 @@ local function get_item(pos, nvm, item_name, count)
 				end
 			end
 		end
+	elseif M(pos):get_int("priority") == 1 then
+		-- Take any items. The position within the inventory is from right to left
+		for idx = 8,1,-1 do
+			local item = nvm.inventory[idx]
+			if item.name ~= "" and (stack.name == nil or stack.name == item.name) then
+				local num = math.min(item.count, count - stack.count, max_stacksize(item.name))
+				if M(pos):get_int("assignment") == 1 and num == item.count then
+					-- never take the last item
+					num = num - 1
+				end
+				stack = move_items_to_stack(item, stack, num)
+				if stack.count == count then
+					return ItemStack(stack)
+				end
+			end
+		end
 	else
 		-- Take any items. The position within the inventory
 		-- is incremented each time so that different item stacks will be considered.
@@ -212,17 +228,20 @@ local function formspec(pos)
 	local inv = M(pos):get_inventory()
 	local size = get_stacksize(pos)
 	local assignment = M(pos):get_int("assignment") == 1 and "true" or "false"
-	return "size[8,8]"..
+	local priority = M(pos):get_int("priority") == 1 and "true" or "false"
+	return "size[8,8.3]"..
 		default.gui_bg..
 		default.gui_bg_img..
 		default.gui_slots..
 		formspec_container(0, 0, nvm, inv)..
-		"button[1,3;2,1;unlock;"..S("Unlock").."]"..
-		"tooltip[1,3;2,1;"..S("Unlock connected chest\nif all slots are below 2000")..";#0C3D32;#FFFFFF]"..
-		"label[4,3;"..S("Size")..": 8x"..size.."]"..
-		"checkbox[4,3.3;assignment;"..S("keep assignment")..";"..assignment.."]"..
-		"tooltip[4,3.5;2,0.6;"..S("Never completely empty the slots\nwith the pusher to keep the items assignment")..";#0C3D32;#FFFFFF]"..
-		"list[current_player;main;0,4.3;8,4;]"..
+		"button[0,3.5;3,1;unlock;"..S("Unlock").."]"..
+		"tooltip[0,3.5;3,1;"..S("Unlock connected chest\nif all slots are below 2000")..";#0C3D32;#FFFFFF]"..
+		"label[0,3;"..S("Size")..": 8x"..size.."]"..
+		"checkbox[4,3;assignment;"..S("keep assignment")..";"..assignment.."]"..
+		"tooltip[4,3;2,0.6;"..S("Never completely empty the slots\nwith the pusher to keep the item assignment")..";#0C3D32;#FFFFFF]"..
+		"checkbox[4,3.6;priority;"..S("right to left")..";"..priority.."]"..
+		"tooltip[4,3.6;2,0.6;"..S("Empty the slots always \nfrom right to left")..";#0C3D32;#FFFFFF]"..
+		"list[current_player;main;0,4.6;8,4;]"..
 		"listring[context;main]"..
 		"listring[current_player;main]"
 end
@@ -392,6 +411,10 @@ local function on_receive_fields(pos, formname, fields, player)
 	if fields.assignment then
 		M(pos):set_int("assignment", fields.assignment == "true" and 1 or 0)
 	end
+	if fields.priority then
+		M(pos):set_int("priority", fields.priority == "true" and 1 or 0)
+	end
+	
 	M(pos):set_string("formspec", formspec(pos))
 end
 
@@ -404,6 +427,14 @@ local function can_dig(pos, player)
 	return inv:is_empty("main") and inv_empty(nvm)
 end
 
+local function on_rotate(pos, node, user, mode, new_param2)
+	if get_stacksize(pos) == STACK_SIZE then
+		return screwdriver.rotate_simple(pos, node, user, mode, new_param2)
+	else
+		return screwdriver.disallow(pos, node, user, mode, new_param2)
+	end
+end
+
 local function after_dig_node(pos, oldnode, oldmetadata, digger)
 	techage.remove_node(pos)
 	convert_to_chest_again(pos, oldnode, digger)
@@ -445,6 +476,7 @@ minetest.register_node("techage:ta4_chest", {
 		return techage.logic.set_numbers(pos, numbers, player_name, DESCRIPTION)
 	end,
 	
+	on_rotate = on_rotate,
 	on_rightclick = on_rightclick,
 	on_receive_fields = on_receive_fields,
 	can_dig = can_dig,
diff --git a/basic_machines/ta4_injector.lua b/basic_machines/ta4_injector.lua
new file mode 100644
index 0000000..1f5017a
--- /dev/null
+++ b/basic_machines/ta4_injector.lua
@@ -0,0 +1,214 @@
+--[[
+
+	TechAge
+	=======
+
+	Copyright (C) 2020 Joachim Stolberg
+
+	GPL v3
+	See LICENSE.txt for more information
+	
+	TA4 Injector
+
+]]--
+
+-- for lazy programmers
+local M = minetest.get_meta
+local S = techage.S
+
+-- Consumer Related Data
+local CRD = function(pos) return (minetest.registered_nodes[techage.get_node_lvm(pos).name] or {}).consumer end
+
+local STANDBY_TICKS = 2
+local COUNTDOWN_TICKS = 4
+local CYCLE_TIME = 3
+
+local function formspec(self, pos, nvm)
+	if CRD(pos).stage == 4 then -- TA4 node?
+		return "size[8,7.2]"..
+			default.gui_bg..
+			default.gui_bg_img..
+			default.gui_slots..
+			"box[0,-0.1;7.8,0.5;#c6e8ff]"..
+			"label[3,-0.1;"..minetest.colorize("#000000", S("Injector")).."]"..
+			techage.question_mark_help(8, S("Configure up to 8 items \nto be pushed by the injector"))..
+			"list[context;filter;0,0.8;8,1;]"..
+			"image_button[3.5,2;1,1;".. self:get_state_button_image(nvm) ..";state_button;]"..
+			"tooltip[3.5,2;1,1;"..self:get_state_tooltip(nvm).."]"..
+			"list[current_player;main;0,3.5;8,4;]"..
+			"listring[context;filter]"..
+			"listring[current_player;main]"
+	end
+end
+
+local function allow_metadata_inventory_put(pos, listname, index, stack, player)
+	if minetest.is_protected(pos, player:get_player_name()) then
+		return 0
+	end
+	
+	local nvm = techage.get_nvm(pos)
+	if CRD(pos).State:get_state(nvm) ~= techage.STOPPED then
+		return 0
+	end
+	
+	local inv = M(pos):get_inventory()
+	local list = inv:get_list(listname)
+	if list[index]:get_count() == 0 then
+		stack:set_count(1)
+		inv:set_stack(listname, index, stack)
+		return 0
+	end
+	return 0
+end
+
+local function allow_metadata_inventory_take(pos, listname, index, stack, player)
+	if minetest.is_protected(pos, player:get_player_name()) then
+		return 0
+	end
+	
+	local nvm = techage.get_nvm(pos)
+	if CRD(pos).State:get_state(nvm) ~= techage.STOPPED then
+		return 0
+	end
+	
+	local inv = M(pos):get_inventory()
+	inv:set_stack(listname, index, nil)
+	return 0
+end
+
+local function pushing(pos, crd, meta, nvm)
+	local pull_dir = meta:get_int("pull_dir")
+	local push_dir = meta:get_int("push_dir")
+	local inv = M(pos):get_inventory()
+	local filter = inv:get_list("filter")
+	local pushed = false
+	local pulled = false
+	
+	for idx, item in ipairs(filter) do
+		local name = item:get_name()
+		if name ~= "" then
+			local items = techage.pull_items(pos, pull_dir, 1, name)
+			if items ~= nil then
+				pulled = true
+				if techage.push_items(pos, push_dir, items, idx) then
+					pushed = true
+				else -- place item back
+					techage.unpull_items(pos, pull_dir, items)
+				end
+			end
+		end
+	end
+	
+	if not pulled then
+		crd.State:idle(pos, nvm)
+	elseif not pushed then
+		crd.State:blocked(pos, nvm)
+	else
+		crd.State:keep_running(pos, nvm, COUNTDOWN_TICKS)
+	end
+end
+
+local function keep_running(pos, elapsed)
+	local nvm = techage.get_nvm(pos)
+	local crd = CRD(pos)
+	pushing(pos, crd, M(pos), nvm)
+end	
+
+local function on_receive_fields(pos, formname, fields, player)
+	if minetest.is_protected(pos, player:get_player_name()) then
+		return
+	end
+	local nvm = techage.get_nvm(pos)
+	CRD(pos).State:state_button_event(pos, nvm, fields)
+	M(pos):set_string("formspec", formspec(CRD(pos).State, pos, nvm))
+end
+
+local tiles = {}
+-- '#' will be replaced by the stage number
+-- '{power}' will be replaced by the power PNG
+tiles.pas = {
+	"techage_filling_ta#.png^techage_frame_ta#_top.png^techage_appl_arrow.png",
+	"techage_filling_ta#.png^techage_frame_ta#.png",
+	"techage_filling_ta#.png^techage_frame_ta#.png^techage_appl_outp.png",
+	"techage_filling_ta#.png^techage_frame_ta#.png^techage_appl_inp.png",
+	"techage_appl_pusher.png^[transformR180]^techage_frame_ta#.png^techage_appl_injector.png",
+	"techage_appl_pusher.png^techage_frame_ta#.png^techage_appl_injector.png",
+}
+tiles.act = {
+	-- up, down, right, left, back, front
+	"techage_filling_ta#.png^techage_frame_ta#_top.png^techage_appl_arrow.png",
+	"techage_filling_ta#.png^techage_frame_ta#.png",
+	"techage_filling_ta#.png^techage_frame_ta#.png^techage_appl_outp.png",
+	"techage_filling_ta#.png^techage_frame_ta#.png^techage_appl_inp.png",
+	{
+		image = "techage_appl_pusher14.png^[transformR180]^techage_frame14_ta#.png^techage_appl_injector14.png",
+		backface_culling = false,
+		animation = {
+			type = "vertical_frames",
+			aspect_w = 32,
+			aspect_h = 32,
+			length = 2.0,
+		},
+	},
+	{
+		image = "techage_appl_pusher14.png^techage_frame14_ta#.png^techage_appl_injector14.png",
+		backface_culling = false,
+		animation = {
+			type = "vertical_frames",
+			aspect_w = 32,
+			aspect_h = 32,
+			length = 2.0,
+		},
+	},
+}
+	
+local tubing = {
+	-- push item through the injector in opposit direction
+	on_push_item = function(pos, in_dir, stack)
+		return in_dir == M(pos):get_int("pull_dir") and techage.push_items(pos, in_dir, stack)
+	end,
+	is_pusher = true, -- is a pulling/pushing node
+	
+	on_recv_message = function(pos, src, topic, payload)
+		return CRD(pos).State:on_receive_message(pos, topic, payload)
+	end,
+}
+	
+local _, _, node_name_ta4 = 
+	techage.register_consumer("injector", S("Injector"), tiles, {
+		cycle_time = CYCLE_TIME,
+		standby_ticks = STANDBY_TICKS,
+		formspec = formspec,
+		tubing = tubing,
+		after_place_node = function(pos, placer)
+			local meta = M(pos)
+			local node = minetest.get_node(pos)
+			meta:set_int("pull_dir", techage.side_to_outdir("L", node.param2))
+			meta:set_int("push_dir", techage.side_to_outdir("R", node.param2))
+			local inv = M(pos):get_inventory()
+			inv:set_size('filter', 8)
+			local nvm = techage.get_nvm(pos)
+			M(pos):set_string("formspec", formspec(CRD(pos).State, pos, nvm))
+		end,
+
+		allow_metadata_inventory_put = allow_metadata_inventory_put,
+		allow_metadata_inventory_take = allow_metadata_inventory_take,
+		on_receive_fields = on_receive_fields,
+		node_timer = keep_running,
+		on_rotate = screwdriver.disallow,
+		
+		groups = {choppy=2, cracky=2, crumbly=2},
+		is_ground_content = false,
+		sounds = default.node_sound_wood_defaults(),
+		num_items = {0,2,6,12},
+	}, {false, false, false, true})
+
+minetest.register_craft({
+	output = node_name_ta4,
+	recipe = {
+		{"", "techage:aluminum", ""},
+		{"", "techage:ta4_pusher_pas", ""},
+		{"", "basic_materials:ic", ""},
+	},
+})
+
diff --git a/basis/conf_inv.lua b/basis/conf_inv.lua
new file mode 100644
index 0000000..8b1badb
--- /dev/null
+++ b/basis/conf_inv.lua
@@ -0,0 +1,109 @@
+--[[
+
+	TechAge
+	=======
+
+	Copyright (C) 2020 Joachim Stolberg
+
+	GPL v3
+	See LICENSE.txt for more information
+	
+	Configured inventory lib
+	Assuming the inventory has the name "conf"
+	
+]]--
+
+-- for lazy programmers
+local M = minetest.get_meta
+
+local inv_lib = {}
+
+function inv_lib.preassigned_stacks(pos, xsize, ysize)
+	local inv = M(pos):get_inventory()
+	local tbl = {}
+	for idx = 1, xsize * ysize do
+		local item_name = inv:get_stack("conf", idx):get_name()
+		if item_name ~= "" then
+			local x = (idx - 1) % xsize
+			local y = math.floor(idx / xsize)
+			tbl[#tbl+1] = "item_image["..x..","..y..";1,1;"..item_name.."]"
+		end
+	end
+	return table.concat(tbl, "")
+end
+
+function inv_lib.item_filter(pos, size)
+	local inv = M(pos):get_inventory()
+	local filter = {}
+	for idx = 1, size do
+		local item_name = inv:get_stack("conf", idx):get_name()
+		if item_name == "" then item_name = "unconfigured" end
+		if not filter[item_name] then 
+			filter[item_name] = {}
+		end
+		table.insert(filter[item_name], idx)
+	end
+	return filter
+end
+
+function inv_lib.allow_conf_inv_put(pos, listname, index, stack, player)
+	local inv = M(pos):get_inventory()
+	local list = inv:get_list(listname)
+	
+	if list[index]:get_count() == 0 then
+		stack:set_count(1)
+		inv:set_stack(listname, index, stack)
+		return 0
+	end
+	return 0
+end
+
+function inv_lib.allow_conf_inv_take(pos, listname, index, stack, player)
+	local inv = M(pos):get_inventory()
+	inv:set_stack(listname, index, nil)
+	return 0
+end
+
+function inv_lib.allow_conf_inv_move(pos, from_list, from_index, to_list, to_index, count, player)
+	local inv = minetest.get_meta(pos):get_inventory()
+	local stack = inv:get_stack(to_list, to_index)
+
+	if stack:get_count() == 0 then
+		return 1
+	else
+		return 0
+	end
+end
+
+function inv_lib.put_items(pos, inv, listname, item, stacks, idx)
+	for _, i in ipairs(stacks) do
+		if not idx or idx == i then
+			local stack = inv:get_stack(listname, i)
+			if stack:item_fits(item) then
+				stack:add_item(item)
+				inv:set_stack(listname, i, stack)
+				return true
+			end
+		end
+	end
+	return false
+end
+
+function inv_lib.take_item(pos, inv, listname, num, stacks)
+	local mem = techage.get_mem(pos)
+	local size = #stacks
+	mem.ta_startpos = mem.ta_startpos or 1
+	for idx = mem.ta_startpos, mem.ta_startpos + size do
+		idx = (idx % size) + 1
+		local stack = inv:get_stack(listname, idx)
+		local taken = stack:take_item(num)
+		if taken:get_count() > 0 then
+			inv:set_stack(listname, idx, stack)
+			mem.ta_startpos = idx
+			return taken
+		end
+	end
+end
+		
+
+return inv_lib
\ No newline at end of file
diff --git a/basis/node_states.lua b/basis/node_states.lua
index b24202f..8230866 100644
--- a/basis/node_states.lua
+++ b/basis/node_states.lua
@@ -53,7 +53,6 @@ Node states:
 
 Node nvm data:
 	"techage_state"      - node state, like "RUNNING"
-	"techage_item_meter" - node item/runtime counter
 	"techage_countdown"  - countdown to standby mode
 ]]--
 
@@ -190,7 +189,6 @@ function NodeStates:node_init(pos, nvm, number)
 	if self.infotext_name then
 		M(pos):set_string("infotext", self.infotext_name.." "..number..": stopped")
 	end
-	nvm.techage_item_meter = 0
 	if self.formspec_func then
 		M(pos):set_string("formspec", self.formspec_func(self, pos, nvm))
 	end
@@ -400,13 +398,12 @@ end
 
 -- To be called after successful node action to raise the timer
 -- and keep the node in state RUNNING
-function NodeStates:keep_running(pos, nvm, val, num_items)
+function NodeStates:keep_running(pos, nvm, val)
 	-- set to RUNNING if not already done
 	if nvm.techage_state ~= RUNNING then
 		self:start(pos, nvm)
 	end
 	nvm.techage_countdown = val or 4
-	nvm.techage_item_meter = (nvm.techage_item_meter or 0) + (num_items or 1)
 end
 
 -- Start/stop node based on button events.
diff --git a/doc/items.lua b/doc/items.lua
index afb5881..b3e4ca0 100644
--- a/doc/items.lua
+++ b/doc/items.lua
@@ -158,10 +158,13 @@ techage.Items = {
 	ta4_gravelsieve = "techage:ta4_gravelsieve_pas",
 	ta4_grinder = "techage:ta4_grinder_pas",
 	ta4_detector = "techage:ta4_detector_off",
-	ta4_chest = "techage:ta4_chest",
+	ta4_chest = "techage:chest_ta4",
+	ta4_8x2000_chest = "techage:ta4_chest",
 	ta4_growlight = "techage:growlight_on",
 	ta4_streetlamp = "techage_ta4_streetlamp.png",
 	ta4_industriallamp = "techage:industriallamp4_off",
 	ta4_quarry = "techage:ta4_quarry_pas",
+	ta4_electronicfab = "techage:ta4_electronic_fab_pas",
+	ta4_injector = "techage:ta4_injector_pas",
 	--ta4_ "", 
 }
diff --git a/doc/manual_DE.lua b/doc/manual_DE.lua
index f116355..1729535 100644
--- a/doc/manual_DE.lua
+++ b/doc/manual_DE.lua
@@ -175,6 +175,8 @@ techage.manual_DE.aTitel = {
   "3,TA4 Kiessieb / Gravel Sieve",
   "3,TA4 Mühle / Grinder",
   "3,TA4 Steinbrecher / Quarry",
+  "3,TA4 Elektronikfabrik / Electronic Fab",
+  "3,TA4 Injektor / Injector",
 }
 
 techage.manual_DE.aText = {
@@ -1358,6 +1360,8 @@ techage.manual_DE.aText = {
   "\n",
   "Die Funktion entspricht der von TA3. Die Kiste kann aber mehr Inhalt aufnehmen.\n"..
   "\n"..
+  "Zusätzlich besitzt die TA4 Kiste ein Schatteninventar zur Konfiguration. Hier können bestimmte Speicherplätze mit einem Item vorbelegt werden. Vorbelegte Speicherplätze werden beim Füllen nur mit diesen Items belegt. Zum Leeren eines vorbelegten Speicherplatzes wird ein TA4 Schieber oder TA4 Injektor mit entsprechender Konfiguration benötigt.\n"..
+  "\n"..
   "\n"..
   "\n",
   "Die TA4 8x2000 Kiste hat kein normales Inventar wir andere Kisten\\, sondern verfügt über 8 Speicher\\, wobei jeder Speicher bis zu 2000 Items einer Sorte aufnehmen kann. Über die orangefarbenen Taster können Items in den Speicher verschoben bzw. wieder heraus geholt werden. Die Kiste kann auch wie sonst üblich mit einem Schieber (TA2\\, TA3 oder TA4) gefüllt bzw. geleert werden.\n"..
@@ -1386,7 +1390,7 @@ techage.manual_DE.aText = {
   "\n"..
   "\n",
   "Die Funktion entspricht der von TA2.\n"..
-  "Die Verarbeitungsleistung beträgt 36 Items alle 4 s.\n"..
+  "Die Verarbeitungsleistung beträgt 24 Items alle 4 s.\n"..
   "\n"..
   "\n"..
   "\n",
@@ -1407,6 +1411,19 @@ techage.manual_DE.aText = {
   "\n"..
   "\n"..
   "\n",
+  "Die Funktion entspricht der von TA2\\, nur werden hier verschiedene Chips produziert.\n"..
+  "Die Verarbeitungsleistung beträgt ein Chip alle 6 s. Der Block benötigt hierfür 12 ku Strom.\n"..
+  "\n"..
+  "\n"..
+  "\n",
+  "Der Injektor ist ein TA4 Schieber mit speziellen Eigenschaften. Er besitzt ein Menü zur Konfiguration. Hier können bis zu 8 Items konfiguriert werden. Er entnimmt nur diese Items einer Kiste (TA4 Kiste oder TA4 8x2000 Kiste) um sie an Maschinen mit Rezepturen weiterzugeben (Autocrafter\\, Industrieofen und Elektronikfabrik). \n"..
+  "\n"..
+  "Beim Weitergeben wird in der Zielmaschine pro Item nur eine Position im Inventar genutzt. Sind bspw. nur die ersten drei Einträge im Injektor konfiguriert\\, so werden auch nur die ersten drei Speicherplätze im Inventar der Maschine belegt. Damit wir ein Überlauf im Inventar der Maschine verhindert. \n"..
+  "\n"..
+  "Die Verarbeitungsleistung beträgt bis zu 8 Items alle 3 Sekunden.\n"..
+  "\n"..
+  "\n"..
+  "\n",
 }
 
 techage.manual_DE.aItemName = {
@@ -1579,11 +1596,13 @@ techage.manual_DE.aItemName = {
   "ta4_tube",
   "ta4_pusher",
   "ta4_chest",
-  "ta4_chest",
+  "ta4_8x2000_chest",
   "ta4_distributor",
   "ta4_gravelsieve",
   "ta4_grinder",
   "ta4_quarry",
+  "ta4_electronicfab",
+  "ta4_injector",
 }
 
 techage.manual_DE.aPlanTable = {
@@ -1761,5 +1780,7 @@ techage.manual_DE.aPlanTable = {
   "",
   "",
   "",
+  "",
+  "",
 }
 
diff --git a/hydrogen/electrolyzer.lua b/hydrogen/electrolyzer.lua
index bf69dc8..dd5956e 100644
--- a/hydrogen/electrolyzer.lua
+++ b/hydrogen/electrolyzer.lua
@@ -110,7 +110,7 @@ local function node_timer(pos, elapsed)
 	if nvm.liquid.amount < CAPACITY then
 		nvm.taken = power.consumer_alive(pos, Cable, CYCLE_TIME)
 		generating(pos, nvm)
-		State:keep_running(pos, nvm, 1, 0) -- count items
+		State:keep_running(pos, nvm, 1) -- TODO warum hier 1 und nicht COUNTDOWN_TICKS?
 	else
 		State:blocked(pos, nvm, S("full"))
 		power.consumer_stop(pos, Cable)
diff --git a/hydrogen/fuelcell.lua b/hydrogen/fuelcell.lua
index f25a8ed..586bc6c 100644
--- a/hydrogen/fuelcell.lua
+++ b/hydrogen/fuelcell.lua
@@ -99,7 +99,7 @@ local function node_timer(pos, elapsed)
 		local outdir = M(pos):get_int("outdir")
 		nvm.given = power.generator_alive(pos, Cable, CYCLE_TIME, outdir)
 		consuming(pos, nvm)
-		State:keep_running(pos, nvm, 1, 0) -- count items
+		State:keep_running(pos, nvm, 1) -- TODO warum hier 1 und nicht COUNTDOWN_TICKS?
 	else
 		State:standby(pos, nvm)
 		nvm.given = 0
diff --git a/hydrogen/fuelcellstack.lua b/hydrogen/fuelcellstack.lua
index 85c962e..7604669 100644
--- a/hydrogen/fuelcellstack.lua
+++ b/hydrogen/fuelcellstack.lua
@@ -24,6 +24,11 @@ minetest.register_craft({
 	recipe = {
 		{'default:copper_ingot', 'techage:ta4_carbon_fiber', 'default:copper_ingot'},
 		{'techage:baborium_ingot', 'techage:ta4_carbon_fiber', 'techage:baborium_ingot'},
-		{"techage:lye", 'techage:ta4_carbon_fiber', 'techage:lye'},
+		{"techage:canister_lye", 'techage:ta4_carbon_fiber', "techage:canister_lye"},
 	},
+	replacements = {
+		{"techage:canister_lye", "techage:ta3_canister_empty"},
+		{"techage:canister_lye", "techage:ta3_canister_empty"},
+	}
 })
+
diff --git a/init.lua b/init.lua
index 7754c06..fa63762 100644
--- a/init.lua
+++ b/init.lua
@@ -110,7 +110,8 @@ else
 	dofile(MP.."/basic_machines/liquidsampler.lua")
 	dofile(MP.."/basic_machines/quarry.lua")
 	dofile(MP.."/basic_machines/ta4_chest.lua")
-
+	dofile(MP.."/basic_machines/ta4_injector.lua")
+	
 	-- Liquids II
 	dofile(MP.."/liquids/tank.lua")
 	dofile(MP.."/liquids/filler.lua")
diff --git a/locale/techage.de.tr b/locale/techage.de.tr
index 6339fbd..771fd21 100644
--- a/locale/techage.de.tr
+++ b/locale/techage.de.tr
@@ -33,6 +33,7 @@ Biome=Biom
 Block configured items for open ports=Blockiere konfigurierte Gegenstände für offene Ausgänge
 Build derrick=Errichte Ölturm
 Compressed Gravel=Komprimiertes Kies
+Configure up to 8 items @nto be pushed by the injector=Konfiguriere bis zu 8 Gegenstände \n die vom Injektor weitergegeben werden sollen
 Consum. 1=Konsum. 1
 Consum. 2=Konsum. 2
 Current power:=Strom aktuell:
@@ -48,6 +49,7 @@ Ele Power Source=Ele Kraftquelle
 Electricity=Strom
 Electrolyzer=Eletrolyseur
 Electronic Fab=Elektronikfabrik
+Empty the slots always @nfrom right to left=Speicherplätze von rechts nach links leeren
 Energy storage=Engergiespeicher
 Energy stored:=Energie gespeichert
 Enter=Eingeben
@@ -59,7 +61,6 @@ Firebox=Feuerkasten
 Flint and Iron=Flint and Iron
 Flowing Oil=Fließendes Öl
 Flywheel=Schwungrad
-Force order of filter items=Erzwinge Reihenfolge
 Fuel Cell=Brennstoffzelle
 Fuel Menu=Brennstoff Menü
 Fuel cell=Brennstoffzelle
@@ -81,9 +82,11 @@ Hole size=Lochgröße
 Hydrogen Cylinder Large=Wasserstoffflasche groß
 Hydrogen Cylinder Small=Wasserstoffflasche klein
 In use:=In Benutzung:
+Injector=Injektor
 Insert destination node number(s)=Gebe Zielnummer(n) ein
 Insert door/gate block number(s)=Gebe Tür-/Tornummer(n) ein
 Intake=Stromaufnahme
+Inventory,Configuration=Inventar,Konfiguration
 Inverter=Wechselrichter
 Leave Powder=Laub Pulver
 Liquid Filler=Einfülltrichter
@@ -109,7 +112,7 @@ More water expected (2 m deep)!=Mehr Wasser erwartet (2 m tief)
 Nacelle is missing=Die Gondel fehlt
 Needle Powder=Nadel Pulver
 Network Data=Netzwerkdaten
-Never completely empty the slots@nwith the pusher to keep the items assignment=Slots mit dem Schieber nie ganz@nleeren, um die Item-Zuordnung beizubehalten
+Never completely empty the slots@nwith the pusher to keep the item assignment=Speicherplätze mit dem Schieber nie ganz@nleeren, um die Item-Zuordnung beizubehalten
 No network or active generator available!=Kein Stromnetz oder aktiver Generator verfügbar
 No plan available=Kein Plan verfügar
 No power grid or running generator!=Kein Stromnetz oder Generator verfügbar!
@@ -367,7 +370,7 @@ Tube Wall Entry=Tube Wanddurchbruch
 Turned on:=Eingeschaltet:
 Type=Typ
 Unlock=Entsperren
-Unlock connected chest@nif all slots are below 2000=Nachfolgende Kiste entsperren,@nsofern alle Slots <= 2000
+Unlock connected chest@nif all slots are below 2000=Nachfolgende Kiste entsperren,@nsofern alle Speicherplätze <= 2000
 Update=Update
 Usmium Nuggets=Usmium Nuggets
 Usmium Powder=Usmium Pulver
@@ -394,6 +397,7 @@ accept=akzeptieren
 added=hinzugefügt wird
 added or removed=hinzugefügt oder entfernt wird
 area is protected=Bereich ist geschützt
+blocking mode=Blockiert
 commands like: help=Kommandos wie: help
 connected with=verbunden mit
 depth=Tiefe
@@ -422,9 +426,9 @@ reactor defect or no power=Reaktor defekt oder kein Strom
 reactor has no power=Reaktor hat keinen Strom
 removed=entfernt
 repaired=repariert
+right to left=von rechts nach links
 stopped=gestoppt
 storage empty?=Speicher leer?
 water temperature=Wassertemperatur
 wrong storage diameter=Falscher Wärmespeicher-Durchmesser
-##### not used anymore #####
-TA4 Wall Pipe=TA4 Wandröhre
\ No newline at end of file
+##### not used anymore #####
\ No newline at end of file
diff --git a/locale/template.txt b/locale/template.txt
index c9e663e..52168a2 100644
--- a/locale/template.txt
+++ b/locale/template.txt
@@ -31,6 +31,7 @@ Biome=
 Block configured items for open ports=
 Build derrick=
 Compressed Gravel=
+Configure up to 8 items @nto be pushed by the injector=
 Consum. 1=
 Consum. 2=
 Current power:=
@@ -46,6 +47,7 @@ Ele Power Source=
 Electricity=
 Electrolyzer=
 Electronic Fab=
+Empty the slots always @nfrom right to left=
 Energy storage=
 Energy stored:=
 Enter=
@@ -57,7 +59,6 @@ Firebox=
 Flint and Iron=
 Flowing Oil=
 Flywheel=
-Force order of filter items=
 Fuel Cell=
 Fuel Menu=
 Fuel cell=
@@ -79,9 +80,11 @@ Hole size=
 Hydrogen Cylinder Large=
 Hydrogen Cylinder Small=
 In use:=
+Injector=
 Insert destination node number(s)=
 Insert door/gate block number(s)=
 Intake=
+Inventory,Configuration=
 Inverter=
 Leave Powder=
 Liquid Filler=
@@ -107,7 +110,7 @@ More water expected (2 m deep)!=
 Nacelle is missing=
 Needle Powder=
 Network Data=
-Never completely empty the slots@nwith the pusher to keep the items assignment=
+Never completely empty the slots@nwith the pusher to keep the item assignment=
 No network or active generator available!=
 No plan available=
 No power grid or running generator!=
@@ -392,6 +395,7 @@ accept=
 added=
 added or removed=
 area is protected=
+blocking mode=
 commands like: help=
 connected with=
 depth=
@@ -420,6 +424,7 @@ reactor defect or no power=
 reactor has no power=
 removed=
 repaired=
+right to left=
 stopped=
 storage empty?=
 water temperature=
diff --git a/logic/programmer.lua b/logic/programmer.lua
index 07b5ea6..1a2830f 100644
--- a/logic/programmer.lua
+++ b/logic/programmer.lua
@@ -36,7 +36,7 @@ local function read_number(itemstack, user, pointed_thing)
 		local number = techage.get_node_number(pos)
 		if number then
 			local numbers = minetest.deserialize(user:get_attribute("techage_prog_numbers")) or {}
-			numbers[number] = true
+			techage.add_to_set(numbers, number)
 			user:set_attribute("techage_prog_numbers", minetest.serialize(numbers))
 			minetest.chat_send_player(user:get_player_name(), S("[TechAge Programmer] number").." "..number.." read")
 		else
@@ -59,7 +59,7 @@ local function program_numbers(itemstack, placer, pointed_thing)
 			minetest.chat_send_player(player_name, S("[TechAge Programmer] foreign or unknown node!"))
 			return itemstack
 		end
-		local text = join_to_string(numbers)
+		local text = table.concat(numbers, " ")
 		local ndef = minetest.registered_nodes[minetest.get_node(pos).name]
 		if ndef and ndef.techage_set_numbers then
 			local res = ndef.techage_set_numbers(pos, text, player_name)
diff --git a/manuals/manual_ta4_DE.md b/manuals/manual_ta4_DE.md
index 06af2e4..8034865 100644
--- a/manuals/manual_ta4_DE.md
+++ b/manuals/manual_ta4_DE.md
@@ -513,6 +513,8 @@ Der TA4 Schieber besitzt zwei zusätzliche Kommandos für den Lua Controller:
 
 Die Funktion entspricht der von TA3. Die Kiste kann aber mehr Inhalt aufnehmen.
 
+Zusätzlich besitzt die TA4 Kiste ein Schatteninventar zur Konfiguration. Hier können bestimmte Speicherplätze mit einem Item vorbelegt werden. Vorbelegte Speicherplätze werden beim Füllen nur mit diesen Items belegt. Zum Leeren eines vorbelegten Speicherplatzes wird ein TA4 Schieber oder TA4 Injektor mit entsprechender Konfiguration benötigt.
+
 [ta4_chest|image]
 
 ### TA4 8x2000 Kiste / TA4 8x2000 Chest
@@ -542,14 +544,14 @@ Der Kiste besitzt ein zusätzliches Kommandos für den Lua Controller:
   Beispiel 1:  `$read_data(CHEST, "count")`  --> Summe der Items über alle 8 Speicher
   Beispiel 2:  `$read_data(CHEST, "count", 2)`  --> Anzahl der Items in Speicher 2 (zweiter von links)
 
-[ta4_chest|image]
+[ta4_8x2000_chest|image]
 
 
 
 ### TA4 Verteiler / Distributor
 
 Die Funktion entspricht der von TA2.  
-Die Verarbeitungsleistung beträgt 36 Items alle 4 s.
+Die Verarbeitungsleistung beträgt 24 Items alle 4 s.
 
 [ta4_distributor|image]
 
@@ -574,4 +576,21 @@ Die Funktion entspricht weitgehend der von TA2.
 Zusätzlich kann die Lochgröße zwischen 3x3 und 11x11 Blöcken eingestellt werden. 
 Die maximale Tiefe beträgt 80 Meter. Der Steinbrecher benötigt 14 ku Strom.
 
-[ta4_quarry|image]
\ No newline at end of file
+[ta4_quarry|image]
+
+### TA4 Elektronikfabrik / Electronic Fab
+
+Die Funktion entspricht der von TA2, nur werden hier verschiedene Chips produziert.  
+Die Verarbeitungsleistung beträgt ein Chip alle 6 s. Der Block benötigt hierfür 12 ku Strom.
+
+[ta4_electronicfab|image]
+
+### TA4 Injektor / Injector
+
+Der Injektor ist ein TA4 Schieber mit speziellen Eigenschaften. Er besitzt ein Menü zur Konfiguration. Hier können bis zu 8 Items konfiguriert werden. Er entnimmt nur diese Items einer Kiste (TA4 Kiste oder TA4 8x2000 Kiste) um sie an Maschinen mit Rezepturen weiterzugeben (Autocrafter, Industrieofen und Elektronikfabrik). 
+
+Beim Weitergeben wird in der Zielmaschine pro Item nur eine Position im Inventar genutzt. Sind bspw. nur die ersten drei Einträge im Injektor konfiguriert, so werden auch nur die ersten drei Speicherplätze im Inventar der Maschine belegt. Damit wir ein Überlauf im Inventar der Maschine verhindert. 
+
+Die Verarbeitungsleistung beträgt bis zu 8 Items alle 3 Sekunden.
+
+[ta4_injector|image]
\ No newline at end of file
diff --git a/manuals/toc_DE.md b/manuals/toc_DE.md
index 2320950..e50c6fe 100644
--- a/manuals/toc_DE.md
+++ b/manuals/toc_DE.md
@@ -173,4 +173,6 @@
         - [TA4 Verteiler / Distributor](./manual_ta4_DE.md#ta4-verteiler--distributor)
         - [TA4 Kiessieb / Gravel Sieve](./manual_ta4_DE.md#ta4-kiessieb--gravel-sieve)
         - [TA4 Mühle / Grinder](./manual_ta4_DE.md#ta4-mühle--grinder)
-        - [TA4 Steinbrecher / Quarry](./manual_ta4_DE.md#ta4-steinbrecher--quarry)
\ No newline at end of file
+        - [TA4 Steinbrecher / Quarry](./manual_ta4_DE.md#ta4-steinbrecher--quarry)
+        - [TA4 Elektronikfabrik / Electronic Fab](./manual_ta4_DE.md#ta4-elektronikfabrik--electronic-fab)
+        - [TA4 Injektor / Injector](./manual_ta4_DE.md#ta4-injektor--injector)
\ No newline at end of file
diff --git a/power/node_api.lua b/power/node_api.lua
index 41d10a7..9d7487e 100644
--- a/power/node_api.lua
+++ b/power/node_api.lua
@@ -86,7 +86,8 @@ local function trigger_network(pos, outdir, Cable)
 		networks.build_network(pos, outdir, Cable, netID)
 	elseif not networks.get_network(Cable.tube_type, netID) then
 		--print("build_network !!!!!!!!!!!!!!!!!!!!")
-		delete_netID(pos, outdir, Cable)
+		netID = determine_netID(pos, outdir, Cable)
+		store_netID(pos, outdir, netID, Cable)
 		networks.build_network(pos, outdir, Cable, netID)
 	end
 end
@@ -169,6 +170,7 @@ function techage.power.consumer_alive(pos, Cable, cycle_time)
 	local nvm = techage.get_nvm(pos)
 	local def = nvm[Cable.tube_type] -- power related network data
 	if def then
+		-- if network is deleted (cable removed/placed) rebuild it to prevent flickering lights
 		if not def["netID"] or not networks.get_network(Cable.tube_type, def["netID"]) then
 			build_network_consumer(pos, Cable)
 		end
diff --git a/power/power_line.lua b/power/power_line.lua
index 784ceb3..707857e 100644
--- a/power/power_line.lua
+++ b/power/power_line.lua
@@ -20,6 +20,16 @@ local networks = techage.networks
 local Cable = techage.ElectricCable
 local power = techage.power
 
+local function can_dig(pos, digger)
+	if M(pos):get_string("owner") == digger:get_player_name() then
+		return true
+	end
+	if minetest.check_player_privs(digger:get_player_name(), "powerline") then
+		return true
+	end
+	return false
+end
+
 -- legacy node
 minetest.register_node("techage:power_line", {
 	description = S("TA Power Line"),
@@ -33,6 +43,7 @@ minetest.register_node("techage:power_line", {
 		return false
 	end,
 	
+	can_dig = can_dig,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		if oldmetadata and oldmetadata.fields and oldmetadata.fields.tl2_param2 then
 			oldnode.param2 = oldmetadata.fields.tl2_param2
@@ -74,6 +85,7 @@ minetest.register_node("techage:power_lineS", {
 		return false
 	end,
 	
+	can_dig = can_dig,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		if oldmetadata and oldmetadata.fields and oldmetadata.fields.tl2_param2 then
 			oldnode.param2 = oldmetadata.fields.tl2_param2
@@ -121,6 +133,7 @@ minetest.register_node("techage:power_lineA", {
 		return false
 	end,
 	
+	can_dig = can_dig,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		if oldmetadata and oldmetadata.fields and oldmetadata.fields.tl2_param2 then
 			oldnode.param2 = oldmetadata.fields.tl2_param2
@@ -199,16 +212,7 @@ minetest.register_node("techage:power_pole2", {
 		end
 		return false
 	end,
-	can_dig = function(pos, digger)
-		local meta = minetest.get_meta(pos)
-		if meta:get_string("owner") == digger:get_player_name() then
-			return true
-		end
-		if minetest.check_player_privs(digger:get_player_name(), "powerline") then
-			return true
-		end
-		return false
-	end,
+	can_dig = can_dig,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		if oldmetadata and oldmetadata.fields and oldmetadata.fields.tl2_param2 then
 			oldnode.param2 = oldmetadata.fields.tl2_param2
@@ -305,16 +309,7 @@ minetest.register_node("techage:power_pole_conn", {
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		Cable:after_dig_node(pos)
 	end,
-	can_dig = function(pos, digger)
-		local meta = minetest.get_meta(pos)
-		if meta:get_string("owner") == digger:get_player_name() then
-			return true
-		end
-		if minetest.check_player_privs(digger:get_player_name(), "powerline") then
-			return true
-		end
-		return false
-	end,
+	can_dig = can_dig,
 	networks = {
 		ele1 = {
 			sides = networks.AllSides, -- connection sides for cables
@@ -350,6 +345,7 @@ minetest.register_node("techage:power_pole3", {
 			{ -4/32, -16/32,  -4/32,   4/32, 16/32,   4/32},
 		},
 	},
+	can_dig = can_dig,
 	on_rotate = screwdriver.disallow, -- important!
 	paramtype = "light",
 	sunlight_propagates = true,
diff --git a/textures/techage_appl_chest_back_ta3.png b/textures/techage_appl_chest_back_ta3.png
index 348152f..6658377 100644
Binary files a/textures/techage_appl_chest_back_ta3.png and b/textures/techage_appl_chest_back_ta3.png differ
diff --git a/textures/techage_appl_chest_back_ta4.png b/textures/techage_appl_chest_back_ta4.png
index 8331455..1559533 100644
Binary files a/textures/techage_appl_chest_back_ta4.png and b/textures/techage_appl_chest_back_ta4.png differ
diff --git a/textures/techage_appl_color_top4.png b/textures/techage_appl_color_top4.png
index 10bc82b..a245b31 100644
Binary files a/textures/techage_appl_color_top4.png and b/textures/techage_appl_color_top4.png differ
diff --git a/textures/techage_appl_injector.png b/textures/techage_appl_injector.png
new file mode 100644
index 0000000..4a887fd
Binary files /dev/null and b/textures/techage_appl_injector.png differ
diff --git a/textures/techage_appl_injector14.png b/textures/techage_appl_injector14.png
new file mode 100644
index 0000000..706b65b
Binary files /dev/null and b/textures/techage_appl_injector14.png differ