diff --git a/basis/recipe_lib.lua b/basis/recipe_lib.lua
index 309a3b4..95ecddc 100644
--- a/basis/recipe_lib.lua
+++ b/basis/recipe_lib.lua
@@ -136,4 +136,4 @@ end
 function techage.recipes.get_recipe(name)
 	return NormalizedRecipes[name]
 end
-	
\ No newline at end of file
+	
diff --git a/carts/tank_cart.lua b/carts/tank_cart.lua
index c7391c3..d3654ac 100644
--- a/carts/tank_cart.lua
+++ b/carts/tank_cart.lua
@@ -118,6 +118,9 @@ minetest.register_node("techage:tank_cart", {
 		local nvm = techage.get_nvm(pos)
 		nvm.liquid = nvm.liquid or {}
 		M(pos):set_string("formspec", techage.liquid.formspec(pos, nvm))
+		-- Delete the network between pump and cart
+		Pipe:after_dig_node(pos) 
+		Pipe:after_place_node(pos)
 	end,
 	
 	set_cargo = function(pos, data)
diff --git a/init.lua b/init.lua
index 9ef177a..69d729b 100644
--- a/init.lua
+++ b/init.lua
@@ -264,7 +264,7 @@ dofile(MP.."/logic/repeater.lua")
 dofile(MP.."/logic/programmer.lua")
 dofile(MP.."/logic/signallamp.lua")
 dofile(MP.."/logic/sequencer.lua")
-dofile(MP.."/logic/sequencer2.lua")
+--dofile(MP.."/logic/sequencer2.lua")   still under dev.
 dofile(MP.."/logic/timer.lua")
 dofile(MP.."/logic/lua_logic.lua")  -- old
 dofile(MP.."/logic/logic_block.lua")  -- new
@@ -277,7 +277,7 @@ dofile(MP.."/logic/doorcontroller.lua")  -- old
 dofile(MP.."/logic/doorcontroller2.lua")  -- new
 dofile(MP.."/logic/collector.lua")
 dofile(MP.."/logic/button_4x.lua")
-dofile(MP.."/logic/movecontroller.lua")
+--dofile(MP.."/logic/movecontroller.lua")   still under dev.
 if minetest.global_exists("mesecon") then
 	dofile(MP.."/logic/mesecons_converter.lua")
 end
diff --git a/liquids/pump.lua b/liquids/pump.lua
index 2762e78..54dc680 100644
--- a/liquids/pump.lua
+++ b/liquids/pump.lua
@@ -45,7 +45,6 @@ local function pumping(pos, nvm, state, capa)
 	local mem = techage.get_mem(pos)
 	mem.dbg_cycles = (mem.dbg_cycles or 0) - 1
 	local outdir = M(pos):get_int("outdir")
-	--print("pumping", outdir, Flip[outdir])
 	local taken, name = liquid.take(pos, Pipe, Flip[outdir], nil, capa, mem.dbg_cycles > 0)
 	if taken > 0 then
 		local leftover = liquid.put(pos, Pipe, outdir, name, taken, mem.dbg_cycles > 0)
diff --git a/liquids/valve.lua b/liquids/valve.lua
index afea000..40406aa 100644
--- a/liquids/valve.lua
+++ b/liquids/valve.lua
@@ -43,6 +43,9 @@ minetest.register_node("techage:ta3_valve_open", {
 		return false
 	end,
 	on_rightclick = function(pos, node, clicker)
+		if minetest.is_protected(pos, clicker:get_player_name()) then
+			return
+		end
 		if liquid.turn_valve_off(pos, Pipe, "techage:ta3_valve_closed", "techage:ta3_valve_open") then
 			minetest.sound_play("techage_valve", {
 				pos = pos, 
@@ -84,6 +87,9 @@ minetest.register_node("techage:ta3_valve_closed", {
 	},
 	
 	on_rightclick = function(pos, node, clicker)
+		if minetest.is_protected(pos, clicker:get_player_name()) then
+			return
+		end
 		if liquid.turn_valve_on(pos, Pipe, "techage:ta3_valve_closed", "techage:ta3_valve_open") then
 			minetest.sound_play("techage_valve", {
 				pos = pos, 
diff --git a/logic/button.lua b/logic/button.lua
index 098e809..7840d8c 100644
--- a/logic/button.lua
+++ b/logic/button.lua
@@ -38,8 +38,9 @@ local function switch_on(pos)
 		logic.swap_node(pos, "techage:ta4_button_on")
 	end
 	local meta = M(pos)
-	local cmnd = meta:contains("command") and meta:get_string("command") or "on"
-	logic.send_cmnd(pos, M(pos), cmnd, cycle_time)
+	local s = meta:contains("command") and meta:get_string("command") or "on"
+	local command, payload = unpack(string.split(s, " ", false, 1))
+	logic.send_cmnd(pos, M(pos), command, payload, cycle_time)
 	minetest.sound_play("techage_button", {
 			pos = pos,
 			gain = 0.5,
diff --git a/logic/button_4x.lua b/logic/button_4x.lua
index 7c6c57b..827bb6b 100644
--- a/logic/button_4x.lua
+++ b/logic/button_4x.lua
@@ -18,20 +18,22 @@ local S = techage.S
 			
 local function get_button_num(pos, clicker, pointed_thing)
 	-- use the node behind the button to get better results
-	local offs = vector.subtract(pointed_thing.under, pointed_thing.above)
-	pointed_thing.under = vector.add(pointed_thing.under, offs)
-	pointed_thing.above = vector.add(pointed_thing.above, offs)
-	local pos1 = minetest.pointed_thing_to_face_pos(clicker, pointed_thing)
-	local y = pos1.y - pos.y
-	
-	if y < -0.3 then
-		return 4
-	elseif y < -0.03 and y > -0.22 then
-		return 3
-	elseif y > 0.03 and y < 0.22 then
-		return 2
-	elseif y > 0.3 then
-		return 1
+	if clicker and pointed_thing then
+		local offs = vector.subtract(pointed_thing.under, pointed_thing.above)
+		pointed_thing.under = vector.add(pointed_thing.under, offs)
+		pointed_thing.above = vector.add(pointed_thing.above, offs)
+		local pos1 = minetest.pointed_thing_to_face_pos(clicker, pointed_thing)
+		local y = pos1.y - pos.y
+		
+		if y < -0.3 then
+			return 4
+		elseif y < -0.03 and y > -0.22 then
+			return 3
+		elseif y > 0.03 and y < 0.22 then
+			return 2
+		elseif y > 0.3 then
+			return 1
+		end
 	end
 end
 
@@ -134,10 +136,11 @@ local function send_cmnd(pos, num)
 	local meta = M(pos)
 	local own_num = meta:get_string("node_number")
 	local dest = meta:get_string("dest_number" .. num)
-	local cmnd = meta:get_string("command" .. num)
+	local s = meta:get_string("command" .. num)
+	local command, payload = unpack(string.split(s, " ", false, 1))
 	local owner = meta:get_string("owner")
 	if techage.check_numbers(dest, owner) then
-		techage.send_multi(own_num, dest, cmnd)
+		techage.send_multi(own_num, dest, command, payload)
 	end
 end
 
diff --git a/logic/doorcontroller2.lua b/logic/doorcontroller2.lua
index 8a6c6b9..9b3e916 100644
--- a/logic/doorcontroller2.lua
+++ b/logic/doorcontroller2.lua
@@ -425,3 +425,5 @@ for _, name in ipairs(ProtectorDoors) do
 		logic.register_doorcontroller_nodes({name .. "_" .. postfix})
 	end
 end
+
+logic.SimpleNodes = RegisteredNodes
diff --git a/logic/lib.lua b/logic/lib.lua
index dfdcd4d..86a99fe 100644
--- a/logic/lib.lua
+++ b/logic/lib.lua
@@ -67,13 +67,13 @@ function techage.logic.send_on(pos, meta, time)
 	return own_num == numbers
 end
 
-function techage.logic.send_cmnd(pos, meta, cmnd, time)
+function techage.logic.send_cmnd(pos, meta, cmnd, payload, time)
 	local own_num = meta:get_string("node_number") or ""
 	local numbers = meta:get_string("numbers") or ""
 	if time and time > 0 then
 		minetest.get_node_timer(pos):start(time)
 	end
-	techage.send_multi(own_num, numbers, cmnd)
+	techage.send_multi(own_num, numbers, cmnd, payload)
 end
 
 function techage.logic.send_off(pos, meta)
diff --git a/logic/movecontroller.lua b/logic/movecontroller.lua
index 0d7b2c2..32c0546 100644
--- a/logic/movecontroller.lua
+++ b/logic/movecontroller.lua
@@ -88,12 +88,12 @@ end
 -- Attach player/mob to given parent object (block)
 local function attach_single_object(parent, obj, dir, height)
 	local self = parent:get_luaentity()
-	local rot = obj:get_rotation() or {x=0, y=0, z=0}
+	local rot = {x=0, y=0, z=0}
 	local prop = obj:get_properties()
 	local res = obj:get_attach()
 	if not res and prop and prop.collisionbox then
 		dir = table.copy(dir)
-		dir.y = dir.y - 1.5 + height - prop.collisionbox[2]
+		dir.y = dir.y - 1.5 + (height or 1) - prop.collisionbox[2]
 		dir = vector.multiply(dir, 29)
 		obj:set_attach(parent, "", dir, rot, true)
 		obj:set_properties({visual_size = {x = 2.9, y = 2.9}})
@@ -108,23 +108,25 @@ local function attach_single_object(parent, obj, dir, height)
 end
 
 -- Attach all entities around to the parent object (block).
--- height is the parrwent block height (-0.5 to 0.5)
+-- height is the parent block height (0.1 to 1.0)
 local function attach_objects(pos, parent, dir, height)
 	local pos1 = vector.add(pos, dir)
 	local self = parent:get_luaentity()
 	self.players = self.players or {}
 	self.entities = self.entities or {}
 
-	for _, obj in pairs(minetest.get_objects_inside_radius(pos1, 0.8)) do
+	print("pos1", P2S(pos1))
+	for _, obj in pairs(minetest.get_objects_inside_radius(pos1, 0.9)) do
 		local entity = obj:get_luaentity()
 		if entity then
 			if entity.name == "__builtin:item" then  -- dropped items
 				--obj:set_attach(objref, "", {x=0, y=0, z=0}, {x=0, y=0, z=0}, true) -- hier kracht es
 			elseif entity.name ~= "techage:move_item" then
-				attach_single_object(parent, obj, dir, height)
+				attach_single_object(parent, obj, dir, 1)
 			end
 		elseif obj:is_player() then
-			attach_single_object(parent, obj, dir)
+			print("is_player")
+			attach_single_object(parent, obj, dir, 1)
 		end
 	end
 end
@@ -158,7 +160,7 @@ local function detach_objects(pos, parent, dir)
 end
 
 local function entity_to_node(pos, obj)
-	local name = obj:get_luaentity().item or "air"
+	local name = (obj:get_luaentity() or {}).item or "air"
 	local rot = obj:get_rotation()
 	detach_objects(pos, obj)
 	obj:remove()
@@ -183,13 +185,16 @@ local function node_to_entity(pos, handover)
 	local dir = minetest.facedir_to_dir(node.param2)
 	local yaw = minetest.dir_to_yaw(dir)
 	local obj = minetest.add_entity(pos, "techage:move_item")
-	local self = obj:get_luaentity() 
-	obj:set_rotation({x=0, y=yaw, z=0})
-	obj:set_properties({wield_item = node.name})
-	obj:set_armor_groups({immortal=1})
-	self.item = node.name
-	self.handover = handover
-	return obj
+	if obj then
+		local self = obj:get_luaentity() 
+		obj:set_rotation({x=0, y=yaw, z=0})
+		obj:set_properties({wield_item = node.name})
+		obj:set_armor_groups({immortal=1})
+		self.item = node.name
+		self.handover = handover
+		self.start_pos = table.copy(pos)
+		return obj
+	end
 end
 
 local function capture_entity(pos)
@@ -219,12 +224,15 @@ local function move_entity(obj, pos2, dir, max_speed)
 end
 
 -- Handover the entity to the next movecontroller
-local function handover_to(self)
+local function handover_to(pos, self)
 	local info = techage.get_node_info(self.handover)
 	if info and info.name == "techage:ta4_movecontroller" then
 		local mem = techage.get_mem(info.pos)
 		if not mem.entities_are_there then
 			mem.entities_are_there = true
+			-- copy move direction
+			--print("techage.get_nvm(pos).pos_2to1", techage.get_nvm(pos).pos_2to1)
+			techage.get_nvm(info.pos).pos_2to1 = techage.get_nvm(pos).pos_2to1
 			minetest.after(0.2, techage.send_single, "0", self.handover, "handover")
 		end
 		return true
@@ -249,7 +257,9 @@ minetest.register_entity("techage:move_item", {
 			item = self.item,
 			max_speed = self.max_speed,
 			dest_pos = self.dest_pos,
+			start_pos = self.start_pos,
 			dir = self.dir,
+			respawn = true,
 		})
 	end,
 	
@@ -259,8 +269,12 @@ minetest.register_entity("techage:move_item", {
 			self.item = tbl.item or "air"
 			self.max_speed = tbl.max_speed or MAX_SPEED
 			self.dest_pos = tbl.dest_pos or self.object:get_pos()
+			self.start_pos = tbl.start_pos or self.object:get_pos()
 			self.dir = tbl.dir or {x=0, y=0, z=0}
 			self.object:set_properties({wield_item = self.item})
+			if tbl.respawn then
+				entity_to_node(self.start_pos, self.object)
+			end
 		end
 	end,
 	
@@ -277,7 +291,7 @@ minetest.register_entity("techage:move_item", {
 				obj:set_acceleration({x=0, y=0, z=0})
 				obj:set_velocity({x=0, y=0, z=0})
 				self.dest_pos = nil
-				if not self.handover or not	handover_to(self) then
+				if not self.handover or not handover_to(pos, self) then
 					minetest.after(0.5, entity_to_node, pos, obj)
 				end
 				self.ttl = 2
@@ -308,7 +322,7 @@ minetest.register_entity("techage:move_item", {
 -------------------------------------------------------------------------------
 local MarkedNodes = {} -- t[player] = {{entity, pos},...} 
 local CurrentPos  -- to mark punched entities
-local RegisteredNodes = {}  -- to be checked before removed/placed
+local SimpleNodes = techage.logic.SimpleNodes
 
 local function is_air_like(pos)
 	local node = minetest.get_node(pos)
@@ -322,8 +336,8 @@ end
 local function is_simple_node(pos)
 	-- special handling
 	local name = minetest.get_node(pos).name
-	if RegisteredNodes[name] ~= nil then 
-		return RegisteredNodes[name] 
+	if SimpleNodes[name] ~= nil then 
+		return SimpleNodes[name] 
 	end
 	
 	local ndef = minetest.registered_nodes[name]
@@ -496,13 +510,15 @@ local function move_node(pos, pos1, pos2, max_speed, handover, height)
 	local dir = determine_dir(pos1, pos2)
 	local obj = node_to_entity(pos1, handover)
 	
-	attach_objects(pos1, obj, {x=0, y=1, z=0}, height)
-	if dir.y == 0 then
-		if (dir.x ~= 0 and dir.z == 0) or (dir.x == 0 and dir.z ~= 0) then
-			attach_objects(pos1, obj, dir, height)
+	if obj then
+		attach_objects(pos1, obj, {x=0, y=height, z=0}, height)
+		if dir.y == 0 then
+			if (dir.x ~= 0 and dir.z == 0) or (dir.x == 0 and dir.z ~= 0) then
+				attach_objects(pos1, obj, dir, 1)
+			end
 		end
+		move_entity(obj, pos2, dir, max_speed)
 	end
-	move_entity(obj, pos2, dir, max_speed)
 end
 
 local function move_nodes(pos, lpos1, lpos2, handover)
@@ -596,16 +612,16 @@ local function move_to_other_pos(pos)
 	local meta = M(pos)
 	local nvm = techage.get_nvm(pos)
 	
-	if nvm.pos2 then
+	if nvm.pos_2to1 then
 		local lpos1 = nvm.lpos1 or {}
 		local lpos2 = nvm.lpos2 or {}
-		nvm.pos2 = false
+		nvm.pos_2to1 = false
 		local handover = meta:contains("handoverA") and meta:get_string("handoverA")
 		return move_nodes(pos, lpos2, lpos1, handover)
 	else
 		local lpos1 = nvm.lpos1 or {}
 		local lpos2 = nvm.lpos2 or {}
-		nvm.pos2 = true
+		nvm.pos_2to1 = true
 		local handover = meta:contains("handoverB") and meta:get_string("handoverB")
 		return move_nodes(pos, lpos1, lpos2, handover)
 	end
@@ -617,16 +633,16 @@ local function takeover(pos)
 	local mem = techage.get_mem(pos)
 	mem.entities_are_there = nil
 	
-	if nvm.pos2 then
+	if nvm.pos_2to1 then
 		local lpos1 = nvm.lpos1 or {}
 		local lpos2 = nvm.lpos2 or {}
-		nvm.pos2 = false
+		nvm.pos_2to1 = false
 		local handover = meta:contains("handoverA") and meta:get_string("handoverA")
 		return moveon_nodes(pos, lpos2, lpos1, handover)
 	else
 		local lpos1 = nvm.lpos1 or {}
 		local lpos2 = nvm.lpos2 or {}
-		nvm.pos2 = true
+		nvm.pos_2to1 = true
 		local handover = meta:contains("handoverB") and meta:get_string("handoverB")
 		return moveon_nodes(pos, lpos1, lpos2, handover)
 	end
@@ -660,7 +676,7 @@ minetest.register_node("techage:ta4_movecontroller", {
 		if fields.record then
 			nvm.lpos1 = nil
 			nvm.lpos2 = nil
-			nvm.pos2 = false
+			nvm.pos_2to1 = false
 			meta:set_string("status", S("Recording..."))
 			local name = player:get_player_name()
 			minetest.chat_send_player(name, S("Click on all blocks that shall be moved"))
@@ -674,17 +690,17 @@ minetest.register_node("techage:ta4_movecontroller", {
 			meta:set_string("distance", fields.distance)
 			nvm.lpos1 = pos_list
 			nvm.lpos2 = table_add(pos_list, to_vector(fields.distance))
-			nvm.pos2 = false
+			nvm.pos_2to1 = false
 			unmark_all(name)
 			meta:set_string("formspec", formspec(nvm, meta))
 		elseif fields.store then
 			meta:set_string("distance", fields.distance)
 			nvm.lpos2 = table_add(nvm.lpos1, to_vector(fields.distance))
-			nvm.pos2 = false
+			nvm.pos_2to1 = false
 			meta:set_string("formspec", formspec(nvm, meta))
 		elseif fields.moveAB then
 			meta:set_string("status", "")
-			nvm.pos2 = false
+			nvm.pos_2to1 = false
 			if move_to_other_pos(pos) then
 				meta:set_string("formspec", formspec(nvm, meta))
 				local name = player:get_player_name()
@@ -692,7 +708,7 @@ minetest.register_node("techage:ta4_movecontroller", {
 			end
 		elseif fields.moveBA then
 			meta:set_string("status", "")
-			nvm.pos2 = true
+			nvm.pos_2to1 = true
 			if move_to_other_pos(pos) then
 				meta:set_string("formspec", formspec(nvm, meta))
 				local name = player:get_player_name()
@@ -723,11 +739,11 @@ techage.register_node({"techage:ta4_movecontroller"}, {
 			return INFO
 		elseif topic == "a2b" then
 			local nvm = techage.get_nvm(pos)
-			nvm.pos2 = false
+			nvm.pos_2to1 = false
 			return move_to_other_pos(pos)
 		elseif topic == "b2a" then
 			local nvm = techage.get_nvm(pos)
-			nvm.pos2 = true
+			nvm.pos_2to1 = true
 			return move_to_other_pos(pos)
 		elseif topic == "move" then
 			return move_to_other_pos(pos)
@@ -738,14 +754,14 @@ techage.register_node({"techage:ta4_movecontroller"}, {
 	end,
 })		
 
---minetest.register_craft({
---	output = "techage:ta4_movecontroller",
---	recipe = {
---		{"techage:aluminum", "group:wood","techage:aluminum"},
---		{"default:mese_crystal_fragment", "techage:ta4_wlanchip", "default:mese_crystal_fragment"},
---		{"group:wood", "basic_materials:gear_steel", "group:wood"},
---	},
---})
+minetest.register_craft({
+	output = "techage:ta4_movecontroller",
+	recipe = {
+		{"default:steel_ingot", "dye:blue", "default:steel_ingot"},
+		{"default:mese_crystal_fragment", "techage:ta4_wlanchip", "default:mese_crystal_fragment"},
+		{"group:wood", "basic_materials:gear_steel", "group:wood"},
+	},
+})
 
 minetest.register_on_joinplayer(function(player)
 	unlock_player(player)
diff --git a/logic/sequencer.lua b/logic/sequencer.lua
index 141d3a2..2784c11 100644
--- a/logic/sequencer.lua
+++ b/logic/sequencer.lua
@@ -60,7 +60,7 @@ local function formspec_help()
 		"label[0,1;Define a sequence of commands\nto control other machines.]"..
 		"label[0,2.2;Numbers(s) are the node numbers,\nthe command shall sent to.]"..
 		"label[0,3.4;The commands 'on'/'off' are used\n for machines and other nodes.]"..
-		"label[0,4.6;Offset is the time to the\nnext line in seconds (1..999).]"..
+		"label[0,4.6;Offset is the time to the\nnext line in seconds (0.2 to 999).]"..
 		"label[0,5.8;If endless is set, the Sequencer\nrestarts again and again.]"..
 		"label[0,7;The command '  ' does nothing,\nonly consuming the offset time.]"..
 		"button[3,8;2,1;exit;close]"
diff --git a/logic/sequencer2.lua b/logic/sequencer2.lua
index 2d8ab58..5c3e547 100644
--- a/logic/sequencer2.lua
+++ b/logic/sequencer2.lua
@@ -31,10 +31,8 @@ end
 local function command(s)
 	local num, cmd, pld = unpack(string.split(s, " ", false, 2))
 	if not num or not cmd then
-		print("error: Invalid command")
-		return
+		return "Invalid command!"
 	end
-	print(num, cmd, pld)
 	return {number = num, cmnd = cmd, payload = pld}
 end
 
@@ -62,14 +60,12 @@ local function compile(s, tRes)
 	local old_idx = 0
 	local start_idx
 	
-	print("Compile")
 	for i, line in ipairs(strsplit(s)) do
 		line = trim(line)
 		line = string.split(line, "--", true, 1)[1] or ""
 		if line ~= "" then
 			local idx, cmnd1, cmnd2 = unpack(string.split(line, " ", false, 2))
 			idx = tonumber(string.match(idx, "^%[(%d+)%]$"))
-			print(idx, old_idx)
 			if not idx then
 				return exception(tRes, i, "Syntax error!")
 			end
@@ -81,23 +77,29 @@ local function compile(s, tRes)
 				tCode[old_idx].next_idx = idx
 			end
 			if cmnd1 == "send" then
-				tCode[idx] = command(cmnd2)
+				local res = command(cmnd2)
+				if type(res) == "string" then
+					return exception(tRes, i, res)
+				end
+				tCode[idx] = res
 			elseif cmnd1 == "goto" then
 				tCode[idx] = {next_idx = tonumber(cmnd2) or 1}
+			elseif cmnd1 == "stop" then
+				tCode[idx] = false
 			elseif cmnd1 == nil then
 				tCode[idx] = {}
 			end
 			old_idx = idx
 		end
 	end
-	-- return {
+	-- Returns: 
+	-- {
 	--   start_idx = 1,
 	--   tCode = {
 	--     <idx> = {number = <number>, cmnd = <string>, payload = <data>, next_idx = <idx>},
 	--     ...
 	--   },
 	-- }
-	print(dump(tCode))
 	return {start_idx=start_idx, tCode=tCode}
 end
 
@@ -160,7 +162,6 @@ local function restart_timer(pos, time)
 end	
 
 local function node_timer(pos, elapsed)
-	print("node_timer")
 	local nvm = techage.get_nvm(pos)
 	if nvm.running then
 		local mem = techage.get_mem(pos)
@@ -169,7 +170,8 @@ local function node_timer(pos, elapsed)
 			mem.idx = mem.idx or mem.code.start_idx
 			local code = mem.code.tCode[mem.idx]
 			if code and code.cmnd then 
-				print(code.number, code.cmnd, code.payload, code.next_idx)
+				local src = M(pos):get_string("node_number") 
+				techage.send_single(src, code.number, code.cmnd, code.payload)
 			end
 			if code and code.next_idx then
 				local offs = code.next_idx - mem.idx
@@ -186,36 +188,37 @@ local function on_receive_fields(pos, formname, fields, player)
 		return
 	end
 	
-	--print(dump(fields))
 	local meta = M(pos)
 	local nvm = techage.get_nvm(pos)
 	local mem = techage.get_mem(pos)
 	nvm.running = nvm.running or false
 	
-	if fields.help then
-		meta:set_string("formspec", formspec_help(nvm, meta))
-		return
-	elseif fields.edit then
-		meta:set_string("formspec", formspec(nvm, meta))
-		return
-	end
-	
-	if fields.save then
+	if fields.stop then
 		nvm.running = false
-		meta:set_string("text", fields.text or "")
-		mem.code = nil
-		mem.idx = nil
-	elseif fields.start then
-		if check_syntax(meta) then
-			nvm.running = true
+		minetest.get_node_timer(pos):stop()
+	elseif not nvm.running then
+		if fields.help then
+			meta:set_string("formspec", formspec_help(nvm, meta))
+			return
+		elseif fields.edit then
+			meta:set_string("formspec", formspec(nvm, meta))
+			return
+		end
+		
+		if fields.save then
+			nvm.running = false
 			meta:set_string("text", fields.text or "")
 			mem.code = nil
 			mem.idx = nil
-			minetest.get_node_timer(pos):start(0.5)
+		elseif fields.start then
+			if check_syntax(meta) then
+				nvm.running = true
+				meta:set_string("text", fields.text or "")
+				mem.code = nil
+				mem.idx = nil
+				minetest.get_node_timer(pos):start(0.5)
+			end
 		end
-	elseif fields.stop then
-		nvm.running = false
-		minetest.get_node_timer(pos):stop()
 	end
 	meta:set_string("formspec", formspec(nvm, meta))
 end
@@ -257,35 +260,31 @@ minetest.register_node("techage:ta4_sequencer", {
 minetest.register_craft({
 	output = "techage:ta4_sequencer",
 	recipe = {
-		{"group:wood", "group:wood", ""},
-		{"default:mese_crystal", "techage:wlanchip", ""},
-		{"group:wood", "group:wood", ""},
+		{"default:steel_ingot", "dye:blue", "default:steel_ingot"},
+		{"techage:ta4_ramchip", "default:mese_crystal", "techage:wlanchip"},
+		{"techage:aluminum", "group:wood","techage:aluminum"},
 	},
 })
 
+local INFO = [[Commands: 'goto <num>', 'stop']]
+
 techage.register_node({"techage:ta4_sequencer"}, {
 	on_recv_message = function(pos, src, topic, payload)
-		if topic == "on" then
-			start_the_sequencer(pos)
-		elseif topic == "off" then
-			-- do not stop immediately
+		if topic == "goto" then
+			local mem = techage.get_mem(pos)
 			local nvm = techage.get_nvm(pos)
-			if not nvm.running then
-				nvm.endless = not (nvm.endless or false)
-			else
-				nvm.endless = false
-			end
-		elseif topic == "pause" then
-			stop_the_sequencer(pos)
+			nvm.running = true
+			mem.idx = tonumber(payload or 1) or 1
+			restart_timer(pos, 0.1)
+		elseif topic == "stop" then
+			local nvm = techage.get_nvm(pos)
+			nvm.running = false
+			minetest.get_node_timer(pos):stop()
+		elseif topic == "info" then
+			return INFO
 		else
 			return "unsupported"
 		end
 	end,
-	on_node_load = function(pos)
-		local nvm = techage.get_nvm(pos)
-		if nvm.running then
-			minetest.get_node_timer(pos):start(1)
-		end
-	end,
 })		
 
diff --git a/tools/repairkit.lua b/tools/repairkit.lua
index 3245d6f..5ea2092 100644
--- a/tools/repairkit.lua
+++ b/tools/repairkit.lua
@@ -76,7 +76,7 @@ local function read_state(itemstack, user, pointed_thing)
 			if ndef and ndef.description then
 				local info = techage.send_single("0", number, "info", nil)
 				if info and info ~= "" and info ~= "unsupported" then
-					info = dump(info)
+					info = tostring(info)
 					minetest.chat_send_player(user:get_player_name(), ndef.description.." "..number..":\n"..info.."    ")
 				end
 				local state = techage.send_single("0", number, "state", nil)
diff --git a/tools/submenu.lua b/tools/submenu.lua
index 6abbc34..a06ad7d 100644
--- a/tools/submenu.lua
+++ b/tools/submenu.lua
@@ -130,7 +130,7 @@ local function value_check(elem, value)
 	if elem.check then
 		return elem.check(value)
 	end
-	return true
+	return value ~= nil
 end
 	
 local function evaluate_data(pos, meta, form_def, fields, player_name)