diff --git a/basis/boiler_lib.lua b/basis/boiler_lib.lua
index f93b747..929bb80 100644
--- a/basis/boiler_lib.lua
+++ b/basis/boiler_lib.lua
@@ -67,6 +67,7 @@ end
 function techage.boiler.water_temperature(pos, nvm)
 	nvm.temperature = nvm.temperature or 20
 	nvm.num_water = nvm.num_water or 0
+	nvm.water_level = nvm.water_level or 0
 	if nvm.fire_trigger then
 		nvm.temperature = math.min(nvm.temperature + HEAT_STEP, 100)
 	else
diff --git a/basis/fuel_lib.lua b/basis/fuel_lib.lua
index 7b48fa4..df46357 100644
--- a/basis/fuel_lib.lua
+++ b/basis/fuel_lib.lua
@@ -71,91 +71,6 @@ function techage.fuel.formspec(nvm)
 		techage.fuel.fuel_container(1.5, 1, nvm)
 end
 
---local function fill_container(pos, inv, nvm)
---	nvm.liquid = nvm.liquid or {}
---	nvm.liquid.amount = nvm.liquid.amount or 0
---	local empty_container = inv:get_stack("fuel", 1):get_name()
---	local full_container = liquid.get_full_container(empty_container, nvm.liquid.name)
---	if empty_container and full_container then
---		local ldef = liquid.get_liquid_def(full_container)
---		if ldef and nvm.liquid.amount - ldef.size >= 0 then 
---			inv:remove_item("fuel", ItemStack(empty_container))
---			inv:add_item("fuel", ItemStack(full_container))
---			nvm.liquid.amount = nvm.liquid.amount - ldef.size
---			if nvm.liquid.amount == 0 then 
---				nvm.liquid.name = nil 
---			end
---		end
---	end
---end
-
---local function empty_container(pos, inv, nvm)
---	nvm.liquid = nvm.liquid or {}
---	nvm.liquid.amount = nvm.liquid.amount or 0
---	local stack = inv:get_stack("fuel", 1)
---	if stack:get_count() == 1 then
---		local ldef = liquid.get_liquid_def(stack:get_name())
---		if ldef and ValidOilFuels[ldef.inv_item] then
---			if not nvm.liquid.name or ldef.inv_item == nvm.liquid.name then
---				if nvm.liquid.amount + ldef.size <= CAPACITY then 
---					inv:remove_item("fuel", stack)
---					inv:add_item("fuel", ItemStack(ldef.container))
---					nvm.liquid.amount = nvm.liquid.amount + ldef.size
---					nvm.liquid.name = ldef.inv_item
---				end
---			end
---		end
---	end
---end
-
---local function move_item(pos, stack)
---	local nvm = techage.get_nvm(pos)
---	local inv = M(pos):get_inventory()
---	if liquid.is_container_empty(stack:get_name()) then
---		fill_container(pos, inv, nvm)
---	else
---		empty_container(pos, inv, nvm)
---	end
---	M(pos):set_string("formspec", techage.fuel.formspec(nvm))
---end
-
---function techage.fuel.move_item(pos, stack, formspec)
---	local nvm = techage.get_nvm(pos)
---	local inv = M(pos):get_inventory()
---	if liquid.is_container_empty(stack:get_name()) then
---		fill_container(pos, inv, nvm)
---	else
---		empty_container(pos, inv, nvm)
---	end
---	M(pos):set_string("formspec", formspec(pos, nvm))
---end
-
---function techage.fuel.allow_metadata_inventory_put(pos, listname, index, stack, player)
---	if minetest.is_protected(pos, player:get_player_name()) then
---		return 0
---	end
---	if liquid.is_container_empty(stack:get_name()) then
---		return 1
---	end
---	local category = LQD(pos).fuel_cat
---	local ldef = liquid.get_liquid_def(stack:get_name())
---	if ldef and ValidOilFuels[ldef.inv_item] and ValidOilFuels[ldef.inv_item] <= category then
---		return 1
---	end
---	return 0
---end
-
---function techage.fuel.allow_metadata_inventory_take(pos, listname, index, stack, player)
---	if minetest.is_protected(pos, player:get_player_name()) then
---		return 0
---	end
---	return stack:get_count()
---end
-
---function techage.fuel.on_metadata_inventory_put(pos, listname, index, stack, player)
---	minetest.after(0.5, move_item, pos, stack)
---end
-
 function techage.fuel.can_dig(pos, player)
 	if minetest.is_protected(pos, player:get_player_name()) then
 		return false
@@ -173,22 +88,6 @@ function techage.fuel.on_rightclick(pos, node, clicker)
 	M(pos):set_string("formspec", techage.fuel.formspec(nvm))
 end
 
---function techage.fuel.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)
---	nvm.countdown = 10
---	M(pos):set_string("formspec", techage.fuel.formspec(nvm))
---end
-
---function techage.fuel.formspec_update(pos, nvm)
---	if nvm.countdown and nvm.countdown > 0 then
---		nvm.countdown = nvm.countdown - 1
---		M(pos):set_string("formspec", techage.fuel.formspec(nvm))
---	end
---end
-
 -- name is the fuel item name
 function techage.fuel.burntime(name)
 	if ValidOilFuels[name] then
@@ -229,3 +128,20 @@ function techage.fuel.on_punch(pos, node, puncher, pointed_thing)
 		end
 	end
 end
+
+function techage.fuel.get_fuel(nvm)
+	if nvm.liquid and nvm.liquid.name and nvm.liquid.amount then
+		if nvm.liquid.amount > 0 then
+			nvm.liquid.amount = nvm.liquid.amount - 1
+			return nvm.liquid.name
+		end
+		nvm.liquid.name = nil 
+	end
+	return nil
+end
+
+function techage.fuel.has_fuel(nvm)
+	nvm.liquid = nvm.liquid or {}
+	nvm.liquid.amount = nvm.liquid.amount or 0
+	return nvm.liquid.amount > 0
+end
\ No newline at end of file
diff --git a/chemistry/ta4_doser.lua b/chemistry/ta4_doser.lua
index cd3dd43..dca4a4e 100644
--- a/chemistry/ta4_doser.lua
+++ b/chemistry/ta4_doser.lua
@@ -48,15 +48,15 @@ local function get_starter_name(pos)
 end
 
 local function formspec(self, pos, nvm)
-	return "size[8,7]"..
+	return "size[6,3.6]"..
 		default.gui_bg..
 		default.gui_bg_img..
 		default.gui_slots..
-		recipes.formspec(0, 0, "ta4_doser", nvm)..
-		"image_button[6,1;1,1;".. self:get_state_button_image(nvm) ..";state_button;]"..
-		"tooltip[6,1;1,1;"..self:get_state_tooltip(nvm).."]"..
-		"list[current_player;main;0,3.3;8,4;]" ..
-		default.get_hotbar_bg(0, 3.5)
+		"box[0,-0.1;5.8,0.5;#c6e8ff]"..
+		"label[2.5,-0.1;"..minetest.colorize( "#000000", S("Doser")).."]"..
+		recipes.formspec(0.1, 0.8, "ta4_doser", nvm)..
+		"image_button[5,2;1,1;".. self:get_state_button_image(nvm) ..";state_button;]"..
+		"tooltip[5,2;1,1;"..self:get_state_tooltip(nvm).."]"
 end
 
 local function get_liquids(pos)
diff --git a/chemistry/ta4_stand.lua b/chemistry/ta4_stand.lua
index 8ef275c..dd70661 100644
--- a/chemistry/ta4_stand.lua
+++ b/chemistry/ta4_stand.lua
@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019 Joachim Stolberg
+	Copyright (C) 2019-2020 Joachim Stolberg
 
 	GPL v3
 	See LICENSE.txt for more information
@@ -23,16 +23,39 @@ local liquid = techage.liquid
 local PWR_NEEDED = 8
 local CYCLE_TIME = 4
 
-local function on_power(pos, nvm)
-	if nvm.running then
-		minetest.get_node_timer(pos):start(CYCLE_TIME)
-		M(pos):set_string("infotext", S("on"))
-		nvm.has_power = true
+local function play_sound(pos)
+	local mem = techage.get_mem(pos)
+	if not mem.handle or mem.handle == -1 then
+		mem.handle = minetest.sound_play("techage_reactor", {
+			pos = pos, 
+			gain = 0.5,
+			max_hear_distance = 10,
+			loop = true})
+		if mem.handle == -1 then
+			minetest.after(1, play_sound, pos)
+		end
 	end
 end
 
-local function on_nopower(pos, nvm)
+local function stop_sound(pos)
+	local mem = techage.get_mem(pos)
+	if mem.handle then
+		minetest.sound_stop(mem.handle)
+		mem.handle = nil
+	end
+end
+
+local function on_power(pos)
+	M(pos):set_string("infotext", S("on"))
+	play_sound(pos)
+	local nvm = techage.get_nvm(pos)
+	nvm.has_power = true
+end
+
+local function on_nopower(pos)
 	M(pos):set_string("infotext", S("no power"))
+	stop_sound(pos)
+	local nvm = techage.get_nvm(pos)
 	nvm.has_power = false
 end
 
@@ -71,29 +94,25 @@ minetest.register_node("techage:ta4_reactor_stand", {
 	
 	after_place_node = function(pos, placer)
 		local nvm = techage.get_nvm(pos)
-		techage.power.after_place_node(pos)
 		M(pos):set_string("infotext", S("off"))
 		M(pos):set_int("outdir", networks.side_to_outdir(pos, "R"))
 		Pipe:after_place_node(pos)
+		Cable:after_place_node(pos)
 	end,
 	tubelib2_on_update2 = function(pos, dir, tlib2, node)
-		liquid.update_network(pos)
-	end,
-	after_tube_update = function(node, pos, out_dir, peer_pos, peer_in_dir) 
-		techage.power.after_tube_update2(node, pos, out_dir, peer_pos, peer_in_dir)
+		if tlib2.tube_type == "ele1" then
+			power.update_network(pos, dir, tlib2)
+		else
+			liquid.update_network(pos, dir, tlib2)
+		end
 	end,
 	on_timer = function(pos, elapsed)
-		local nvm = techage.get_nvm(pos)
-		power.consumer_alive(pos, nvm)
-		minetest.sound_play("techage_reactor", {
-				pos = pos, 
-				gain = 0.5,
-				max_hear_distance = 10})
-		return nvm.running
+		power.consumer_alive(pos, Cable, CYCLE_TIME)
+		return true
 	end,
 	after_dig_node = function(pos, oldnode)
-		techage.power.after_dig_node(pos, oldnode)
 		Pipe:after_dig_node(pos)
+		Cable:after_dig_node(pos)
 		techage.del_mem(pos)
 	end,
 	
@@ -103,23 +122,22 @@ minetest.register_node("techage:ta4_reactor_stand", {
 	groups = {cracky=2},
 	is_ground_content = false,
 	sounds = default.node_sound_metal_defaults(),
-	-- Pipe connection
+
 	networks = {
 		pipe2 = {
 			sides = {R=1}, 
 			ntype = "pump",
 		},
+		ele1 = {
+			sides = {L=1},
+			ntype = "con1",
+			on_power = on_power,
+			on_nopower = on_nopower,
+			nominal = PWR_NEEDED,
+		},
 	},
 })
 
--- for electrical connections
-techage.power.enrich_node({"techage:ta4_reactor_stand"}, {
-	conn_sides = {"L"},
-	power_network  = Cable,
-	on_power = on_power,
-	on_nopower = on_nopower,
-})
-
 -- controlled by the fillerpipe
 techage.register_node({"techage:ta4_reactor_stand"}, {
 	on_transfer = function(pos, in_dir, topic, payload)
@@ -131,14 +149,13 @@ techage.register_node({"techage:ta4_reactor_stand"}, {
 			return liquid.put(pos, outdir, payload.name, payload.amount, payload.player_name)
 		elseif topic == "can_start" then
 			return power.power_available(pos, Cable)
-		elseif topic == "start" and payload then
-			nvm.running = true
+		elseif topic == "start" then
 			nvm.has_power = false
 			power.consumer_start(pos, Cable, CYCLE_TIME)
+			minetest.get_node_timer(pos):start(CYCLE_TIME)
 			M(pos):set_string("infotext", "...")
 			return true
 		elseif topic == "stop" then
-			nvm.running = false
 			nvm.has_power = false
 			power.consumer_stop(pos, Cable)
 			minetest.get_node_timer(pos):stop()
@@ -146,6 +163,12 @@ techage.register_node({"techage:ta4_reactor_stand"}, {
 			return true
 		end
 	end,
+	on_node_load = function(pos, node)
+		local nvm = techage.get_nvm(pos)
+		if nvm.has_power then
+			play_sound(pos)
+		end	
+	end,
 })
 
 minetest.register_node("techage:ta4_reactor_base", {
@@ -165,7 +188,7 @@ minetest.register_node("techage:ta4_reactor_base", {
 		Pipe:after_place_node(pos)
 	end,
 	tubelib2_on_update2 = function(pos, dir, tlib2, node)
-		liquid.update_network(pos)
+		liquid.update_network(pos, dir, tlib2)
 	end,
 	after_dig_node = function(pos, oldnode, oldmetadata, digger)
 		Pipe:after_dig_node(pos)
@@ -190,6 +213,8 @@ Pipe:add_secondary_node_names({
 		"techage:ta4_reactor_stand",
 })
 
+Cable:add_secondary_node_names({"techage:ta4_reactor_stand"})
+
 minetest.register_craft({
 	output = 'techage:ta4_reactor_stand',
 	recipe = {
diff --git a/coal_power_station/firebox.lua b/coal_power_station/firebox.lua
index 9634035..4a10fbe 100644
--- a/coal_power_station/firebox.lua
+++ b/coal_power_station/firebox.lua
@@ -36,33 +36,31 @@ end
 
 local function node_timer(pos, elapsed)
 	local nvm = techage.get_nvm(pos)
-	if nvm.running then
-		local power = techage.transfer(
-			{x=pos.x, y=pos.y+2, z=pos.z}, 
-			nil,  -- outdir
-			"trigger",  -- topic
-			nil,  -- payload
-			nil,  -- network
-			{"techage:coalboiler_top"}  -- nodenames
-		)
-		nvm.burn_cycles = (nvm.burn_cycles or 0) - math.max((power or 0.02), 0.02)
-		if nvm.burn_cycles <= 0 then
-			local taken = firebox.get_fuel(pos) 
-			if taken then
-				nvm.burn_cycles = (firebox.Burntime[taken:get_name()] or 1) / CYCLE_TIME * BURN_CYCLE_FACTOR
-				nvm.burn_cycles_total = nvm.burn_cycles
-			else
-				nvm.running = false
-				firehole(pos, false)
-				M(pos):set_string("formspec", firebox.formspec(nvm))
-				return false
-			end
-		end
-		if techage.is_activeformspec(pos) then
+	local power = techage.transfer(
+		{x=pos.x, y=pos.y+2, z=pos.z}, 
+		nil,  -- outdir
+		"trigger",  -- topic
+		nil,  -- payload
+		nil,  -- network
+		{"techage:coalboiler_top"}  -- nodenames
+	)
+	nvm.burn_cycles = (nvm.burn_cycles or 0) - math.max((power or 0.02), 0.02)
+	if nvm.burn_cycles <= 0 then
+		local taken = firebox.get_fuel(pos) 
+		if taken then
+			nvm.burn_cycles = (firebox.Burntime[taken:get_name()] or 1) / CYCLE_TIME * BURN_CYCLE_FACTOR
+			nvm.burn_cycles_total = nvm.burn_cycles
+		else
+			nvm.running = false
+			firehole(pos, false)
 			M(pos):set_string("formspec", firebox.formspec(nvm))
+			return false
 		end
-		return true
 	end
+	if techage.is_activeformspec(pos) then
+		M(pos):set_string("formspec", firebox.formspec(nvm))
+	end
+	return true
 end
 
 local function start_firebox(pos, nvm)
diff --git a/coal_power_station/oilfirebox.lua b/coal_power_station/oilfirebox.lua
index 16dba80..9c9cfbb 100644
--- a/coal_power_station/oilfirebox.lua
+++ b/coal_power_station/oilfirebox.lua
@@ -3,7 +3,7 @@
 	TechAge
 	=======
 
-	Copyright (C) 2019 Joachim Stolberg
+	Copyright (C) 2019-2020 Joachim Stolberg
 
 	GPL v3
 	See LICENSE.txt for more information
@@ -23,7 +23,7 @@ local Pipe = techage.LiquidPipe
 local liquid = techage.liquid
 
 local CYCLE_TIME = 2
-local EFFICIENCY = 0.5
+local BURN_CYCLE_FACTOR = 0.5
 
 local function firehole(pos, on)
 	local param2 = techage.get_node_lvm(pos).param2
@@ -39,36 +39,35 @@ end
 
 local function node_timer(pos, elapsed)
 	local nvm = techage.get_nvm(pos)
-	if nvm.running then
-		-- trigger generator and provide power ratio 0..1
-		local ratio = techage.transfer(
-			{x=pos.x, y=pos.y+2, z=pos.z}, 
-			nil,  -- outdir
-			"trigger",  -- topic
-			(nvm.power_level or 4)/4.0,  -- payload
-			nil,  -- network
-			{"techage:coalboiler_top"}  -- nodenames
-		)
-		ratio = math.max((ratio or 0.02), 0.02)
-		nvm.burn_cycles = (nvm.burn_cycles or 0) - ratio
-		if nvm.burn_cycles <= 0 then
-			local taken = firebox.get_fuel(pos) 
-			if taken then
-				nvm.burn_cycles = (firebox.Burntime[taken:get_name()] or 1) * EFFICIENCY / CYCLE_TIME
-				nvm.burn_cycles_total = nvm.burn_cycles
-			else
-				nvm.running = false
-				firehole(pos, false)
-				M(pos):set_string("formspec", firebox.formspec(nvm))
-				return false
-			end
+	local power = techage.transfer(
+		{x=pos.x, y=pos.y+2, z=pos.z}, 
+		nil,  -- outdir
+		"trigger",  -- topic
+		nil,  -- payload
+		nil,  -- network
+		{"techage:coalboiler_top"}  -- nodenames
+	)
+	nvm.burn_cycles = (nvm.burn_cycles or 0) - math.max((power or 0.02), 0.02)
+	if nvm.burn_cycles <= 0 then
+	local liq_name = fuel.get_fuel(nvm)
+		if liq_name then
+			nvm.burn_cycles = fuel.burntime(liq_name) / CYCLE_TIME * BURN_CYCLE_FACTOR
+			nvm.burn_cycles_total = nvm.burn_cycles
+		else
+			nvm.running = false
+			firehole(pos, false)
+			M(pos):set_string("formspec", fuel.formspec(nvm))
+			return false
 		end
-		return true
 	end
+	if techage.is_activeformspec(pos) then
+		M(pos):set_string("formspec", fuel.formspec(nvm))
+	end
+	return true
 end
 
 local function start_firebox(pos, nvm)
-	if not nvm.running then
+	if not nvm.running and fuel.has_fuel(nvm) then
 		nvm.running = true
 		node_timer(pos, 0)
 		firehole(pos, true)
@@ -76,162 +75,6 @@ local function start_firebox(pos, nvm)
 	end
 end
 
-minetest.register_node("techage:coalfirebox", {
-	description = S("TA3 Power Station Firebox"),
-	inventory_image = "techage_coal_boiler_inv.png",
-	tiles = {"techage_coal_boiler_mesh_top.png"},
-	drawtype = "mesh",
-	mesh = "techage_cylinder_12.obj",
-	selection_box = {
-		type = "fixed",
-		fixed = {-13/32, -16/32, -13/32, 13/32, 16/32, 13/32},
-	},
-
-	paramtype = "light",
-	paramtype2 = "facedir",
-	on_rotate = screwdriver.disallow,
-	groups = {cracky=2},
-	is_ground_content = false,
-	sounds = default.node_sound_stone_defaults(),
-
-	on_timer = node_timer,
-	can_dig = firebox.can_dig,
-	allow_metadata_inventory_put = firebox.allow_metadata_inventory_put,
-	allow_metadata_inventory_take = firebox.allow_metadata_inventory_take,
-	on_receive_fields = firebox.on_receive_fields,
-	on_rightclick = firebox.on_rightclick,
-	
-	on_construct = function(pos)
-		local nvm = techage.get_nvm(pos)
-		techage.add_node(pos, "techage:coalfirebox")
-		nvm.running = false
-		nvm.burn_cycles = 0
-		nvm.power_level = 4
-		local meta = M(pos)
-		meta:set_string("formspec", firebox.formspec(nvm))
-		local inv = meta:get_inventory()
-		inv:set_size('fuel', 1)
-		firehole(pos, false)
-	end,
-
-	on_destruct = function(pos)
-		firehole(pos, nil)
-	end,
-
-	on_metadata_inventory_put = function(pos, listname, index, stack, player)
-		local nvm = techage.get_nvm(pos)
-		start_firebox(pos, nvm)
-		M(pos):set_string("formspec", firebox.formspec(nvm))
-	end,
-})
-
-minetest.register_node("techage:coalfirehole", {
-	description = S("TA3 Coal Power Station Firebox"),
-	tiles = {
-		-- up, down, right, left, back, front
-		"techage_coal_boiler.png",
-		"techage_coal_boiler.png",
-		"techage_coal_boiler.png",
-		"techage_coal_boiler.png",
-		"techage_coal_boiler.png",
-		"techage_coal_boiler.png^techage_appl_firehole.png",
-	},
-	drawtype = "nodebox",
-	node_box = {
-		type = "fixed",
-		fixed = {
-			{-6/16, -6/16,  6/16,  6/16, 6/16,  12/16},
-		},
-	},
-
-	paramtype = "light",
-	paramtype2 = "facedir",
-	pointable = false,
-	diggable = false,
-	is_ground_content = false,
-	groups = {not_in_creative_inventory=1},
-})
-
-minetest.register_node("techage:coalfirehole_on", {
-	description = S("TA3 Coal Power Station Firebox"),
-	tiles = {
-		-- up, down, right, left, back, front
-		"techage_coal_boiler.png^[colorize:black:80",
-		"techage_coal_boiler.png^[colorize:black:80",
-		"techage_coal_boiler.png^[colorize:black:80",
-		"techage_coal_boiler.png^[colorize:black:80",
-		"techage_coal_boiler.png^[colorize:black:80",
-		{
-			image = "techage_coal_boiler4.png^[colorize:black:80^techage_appl_firehole4.png",
-			backface_culling = false,
-			animation = {
-				type = "vertical_frames",
-				aspect_w = 32,
-				aspect_h = 32,
-				length = 0.4,
-			},
-		},
-	},
-	drawtype = "nodebox",
-	node_box = {
-		type = "fixed",
-		fixed = {
-			{-6/16, -6/16,  6/16,  6/16, 6/16,  12/16},
-		},
-	},
-	paramtype = "light",
-	paramtype2 = "facedir",
-	light_source = 8,
-	pointable = false,
-	diggable = false,
-	is_ground_content = false,
-	groups = {not_in_creative_inventory=1},
-})
-
-local function on_timer2(pos, elapsed)
-	local nvm = techage.get_nvm(pos)
-	if nvm.running then
-		fuel.formspec_update(pos, nvm)
-		-- trigger generator and provide power ratio 0..1
-		local ratio = techage.transfer(
-			{x=pos.x, y=pos.y+2, z=pos.z}, 
-			nil,  -- outdir
-			"trigger",  -- topic
-			(nvm.power_level or 4)/4.0,  -- payload
-			nil,  -- network
-			{"techage:coalboiler_top"}  -- nodenames
-		)
-		ratio = math.max((ratio or 0.02), 0.02)
-		nvm.burn_cycles = (nvm.burn_cycles or 0) - ratio
-		nvm.liquid = nvm.liquid or {}
-		nvm.liquid.amount = nvm.liquid.amount or 0
-		if nvm.burn_cycles <= 0 then
-			if nvm.liquid.amount > 0 then
-				nvm.liquid.amount = nvm.liquid.amount - 1
-				nvm.burn_cycles = fuel.burntime(nvm.liquid.name) * EFFICIENCY / CYCLE_TIME
-				nvm.burn_cycles_total = nvm.burn_cycles
-			else
-				nvm.running = false
-				nvm.liquid.name = nil 
-				firehole(pos, false)
-				M(pos):set_string("formspec", fuel.formspec(nvm))
-				return false
-			end
-		end
-		return true
-	end
-end
-
-local function start_firebox2(pos, nvm)
-	if not nvm.running and nvm.liquid.amount > 0 then
-		nvm.running = true
-		on_timer2(pos, 0)
-		firehole(pos, true)
-		minetest.get_node_timer(pos):start(CYCLE_TIME)
-		M(pos):set_string("formspec", fuel.formspec(nvm))
-	end
-end
-
 minetest.register_node("techage:oilfirebox", {
 	description = S("TA3 Power Station Oil Burner"),
 	inventory_image = "techage_oil_boiler_inv.png",
@@ -250,16 +93,17 @@ minetest.register_node("techage:oilfirebox", {
 	is_ground_content = false,
 	sounds = default.node_sound_stone_defaults(),
 
-	on_timer = on_timer2,
+	on_timer = node_timer,
 	can_dig = fuel.can_dig,
-	allow_metadata_inventory_take = fuel.allow_metadata_inventory_take,
 	allow_metadata_inventory_put = fuel.allow_metadata_inventory_put,
-	on_receive_fields = fuel.on_receive_fields,
+	allow_metadata_inventory_take = fuel.allow_metadata_inventory_take,
 	on_rightclick = fuel.on_rightclick,
+	on_receive_fields = fuel.on_receive_fields,
+	on_punch = fuel.on_punch,
 	
 	on_construct = function(pos)
-		local nvm = techage.get_nvm(pos)
 		techage.add_node(pos, "techage:oilfirebox")
+		local nvm = techage.get_nvm(pos)
 		nvm.running = false
 		nvm.burn_cycles = 0
 		nvm.liquid = {}
@@ -279,7 +123,7 @@ minetest.register_node("techage:oilfirebox", {
 		local nvm = techage.get_nvm(pos)
 		nvm.liquid = nvm.liquid or {}
 		nvm.liquid.amount = nvm.liquid.amount or 0
-		minetest.after(1, start_firebox2, pos, nvm)
+		minetest.after(1, start_firebox, pos, nvm)
 		fuel.on_metadata_inventory_put(pos, listname, index, stack, player)
 	end,
 
@@ -293,15 +137,26 @@ minetest.register_node("techage:oilfirebox", {
 				local nvm = techage.get_nvm(pos)
 				nvm.liquid = nvm.liquid or {}
 				nvm.liquid.amount = nvm.liquid.amount or 0
-				start_firebox2(pos, nvm)
+				start_firebox(pos, nvm)
+				if techage.is_activeformspec(pos) then
+					local nvm = techage.get_nvm(pos)
+					M(pos):set_string("formspec", fuel.formspec(nvm))
+				end
 				return leftover
 			end
 			return amount
 		end,
-		take = liquid.srv_take,
+		take = function(pos, indir, name, amount)
+			amount, name = liquid.srv_take(pos, indir, name, amount)
+			if techage.is_activeformspec(pos) then
+				local nvm = techage.get_nvm(pos)
+				M(pos):set_string("formspec", fuel.formspec(nvm))
+			end
+			return amount, name
+		end
 	},
 	networks = {
-		pipe = {
+		pipe2 = {
 			sides = techage.networks.AllSides, -- Pipe connection sides
 			ntype = "tank",
 		},
@@ -311,45 +166,6 @@ minetest.register_node("techage:oilfirebox", {
 Pipe:add_secondary_node_names({"techage:oilfirebox"})
 
 
-techage.register_node({"techage:coalfirebox"}, {
-	on_pull_item = function(pos, in_dir, num)
-		local meta = minetest.get_meta(pos)
-		local inv = meta:get_inventory()
-		return techage.get_items(inv, "fuel", num)
-	end,
-	on_push_item = function(pos, in_dir, stack)
-		if firebox.Burntime[stack:get_name()] then
-			local meta = minetest.get_meta(pos)
-			local inv = meta:get_inventory()
-			local nvm = techage.get_nvm(pos)
-			start_firebox(pos, nvm)
-			return techage.put_items(inv, "fuel", stack)
-		end
-		return false
-	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, "fuel", stack)
-	end,
-	on_recv_message = function(pos, src, topic, payload)
-		local nvm = techage.get_nvm(pos)
-		if topic == "state" then
-			if nvm.running then
-				return "running"
-			else
-				return "stopped"
-			end
-		elseif topic == "fuel" then
-			local inv = M(pos):get_inventory()
-			local stack = inv:get_stack("fuel", 1)
-			return stack:get_count()
-		else
-			return "unsupported"
-		end
-	end,
-})
-
 techage.register_node({"techage:oilfirebox"}, {
 	on_recv_message = function(pos, src, topic, payload)
 		local nvm = techage.get_nvm(pos)
@@ -367,15 +183,6 @@ techage.register_node({"techage:oilfirebox"}, {
 	end,
 })
 
-minetest.register_craft({
-	output = "techage:coalfirebox",
-	recipe = {
-		{'default:stone', 'default:stone', 'default:stone'},
-		{'default:steel_ingot', '', 'default:steel_ingot'},
-		{'default:stone', 'default:stone', 'default:stone'},
-	},
-})
-
 minetest.register_craft({
 	output = "techage:oilfirebox",
 	recipe = {
@@ -388,9 +195,11 @@ minetest.register_craft({
 minetest.register_lbm({
 	label = "[techage] Power Station firebox",
 	name = "techage:steam_engine",
-	nodenames = {"techage:coalfirebox", "techage:oilfirebox"},
+	nodenames = {"techage:oilfirebox"},
 	run_at_every_load = true,
 	action = function(pos, node)
+		local nvm = techage.get_nvm(pos)
+		nvm.running = true
 		minetest.get_node_timer(pos):start(CYCLE_TIME)
 	end
 })
diff --git a/furnace/firebox.lua b/furnace/firebox.lua
index 395f67d..760fbd6 100644
--- a/furnace/firebox.lua
+++ b/furnace/firebox.lua
@@ -41,7 +41,6 @@ local function node_timer(pos, elapsed)
 	nvm.liquid = nvm.liquid or {}
 	nvm.liquid.amount = nvm.liquid.amount or 0
 	if nvm.running then
-		fuel.formspec_update(pos, nvm)
 		nvm.burn_cycles = (nvm.burn_cycles or 0) - 1
 		if nvm.burn_cycles <= 0 then
 			if nvm.liquid.amount > 0 then
diff --git a/init.lua b/init.lua
index abe4bd8..c153e85 100644
--- a/init.lua
+++ b/init.lua
@@ -119,6 +119,7 @@ else
 	dofile(MP.."/coal_power_station/generator.lua")
 	dofile(MP.."/coal_power_station/turbine.lua")
 	dofile(MP.."/coal_power_station/cooler.lua")
+	dofile(MP.."/coal_power_station/oilfirebox.lua")
 	
 --	-- Industrial Furnace
 	dofile(MP.."/furnace/firebox.lua")
@@ -199,8 +200,8 @@ else
 	
 --	-- Chemistry
 	dofile(MP.."/chemistry/ta4_reactor.lua")
---	dofile(MP.."/chemistry/ta4_stand.lua")
---	dofile(MP.."/chemistry/ta4_doser.lua")
+	dofile(MP.."/chemistry/ta4_stand.lua")
+	dofile(MP.."/chemistry/ta4_doser.lua")
 	
 --	-- Hydrogen
 --	dofile(MP.."/hydrogen/fuelcellstack.lua")
diff --git a/liquids/fuel_lib.lua b/liquids/fuel_lib.lua
deleted file mode 100644
index 9646895..0000000
--- a/liquids/fuel_lib.lua
+++ /dev/null
@@ -1,268 +0,0 @@
---[[
-
-	TechAge
-	=======
-
-	Copyright (C) 2019-2020 Joachim Stolberg
-
-	GPL v3
-	See LICENSE.txt for more information
-	
-	Oil fuel burning lib
-
-]]--
-
-local S2P = minetest.string_to_pos
-local P2S = minetest.pos_to_string
-local M = minetest.get_meta
-local S = techage.S
-local LQD = function(pos) return (minetest.registered_nodes[techage.get_node_lvm(pos).name] or {}).liquid end
-local Pipe = techage.LiquidPipe
-local liquid = techage.liquid
-local ValidOilFuels = techage.firebox.ValidOilFuels
-local Burntime = techage.firebox.Burntime
-
-techage.fuel = {}
-
-local CAPACITY = 50
-local BLOCKING_TIME = 0.3 -- 300ms
-
-techage.fuel.CAPACITY = CAPACITY
-
--- fuel burning categories (better than...)
-techage.fuel.BT_BITUMEN = 4
-techage.fuel.BT_OIL     = 3
-techage.fuel.BT_FUELOIL = 2
-techage.fuel.BT_NAPHTHA = 1
-
-
-function techage.fuel.fuel_container(x, y, nvm)
-	local itemname = ""
-	if nvm.liquid and nvm.liquid.name and nvm.liquid.amount and nvm.liquid.amount > 0  then
-		itemname = nvm.liquid.name.." "..nvm.liquid.amount
-	end
-	local fuel_percent = 0
-	if nvm.running then
-		fuel_percent = ((nvm.burn_cycles or 1) * 100) / (nvm.burn_cycles_total or 1)
-	end
-	return "container["..x..","..y.."]"..
-		"box[0,0;1.05,2.1;#000000]"..
-		"image[0.1,0.1;1,1;default_furnace_fire_bg.png^[lowpart:"..
-		fuel_percent..":default_furnace_fire_fg.png]"..
-		techage.item_image(0.1, 1.1, itemname)..
-		"container_end[]"
-end	
-
-local function help(x, y)
-	local tooltip = S("To add fuel punch\nthis block\nwith a fuel container")
-	return "label["..x..","..y..";"..minetest.colorize("#000000", minetest.formspec_escape("[?]")).."]"..
-		"tooltip["..x..","..y..";0.5,0.5;"..tooltip..";#0C3D32;#FFFFFF]"
-end
-
-function techage.fuel.formspec(nvm)
-	local title = S("Fuel Menu")
-	return "size[4,3]"..
-		default.gui_bg..
-		default.gui_bg_img..
-		default.gui_slots..
-		"box[0,-0.1;3.8,0.5;#c6e8ff]"..
-		"label[1,-0.1;"..minetest.colorize("#000000", title).."]"..
-		help(3.4, -0.1)..
-		techage.fuel.fuel_container(1.5, 1, nvm)
-end
-
---local function fill_container(pos, inv, nvm)
---	nvm.liquid = nvm.liquid or {}
---	nvm.liquid.amount = nvm.liquid.amount or 0
---	local empty_container = inv:get_stack("fuel", 1):get_name()
---	local full_container = liquid.get_full_container(empty_container, nvm.liquid.name)
---	if empty_container and full_container then
---		local ldef = liquid.get_liquid_def(full_container)
---		if ldef and nvm.liquid.amount - ldef.size >= 0 then 
---			inv:remove_item("fuel", ItemStack(empty_container))
---			inv:add_item("fuel", ItemStack(full_container))
---			nvm.liquid.amount = nvm.liquid.amount - ldef.size
---			if nvm.liquid.amount == 0 then 
---				nvm.liquid.name = nil 
---			end
---		end
---	end
---end
-
---local function empty_container(pos, inv, nvm)
---	nvm.liquid = nvm.liquid or {}
---	nvm.liquid.amount = nvm.liquid.amount or 0
---	local stack = inv:get_stack("fuel", 1)
---	if stack:get_count() == 1 then
---		local ldef = liquid.get_liquid_def(stack:get_name())
---		if ldef and ValidOilFuels[ldef.inv_item] then
---			if not nvm.liquid.name or ldef.inv_item == nvm.liquid.name then
---				if nvm.liquid.amount + ldef.size <= CAPACITY then 
---					inv:remove_item("fuel", stack)
---					inv:add_item("fuel", ItemStack(ldef.container))
---					nvm.liquid.amount = nvm.liquid.amount + ldef.size
---					nvm.liquid.name = ldef.inv_item
---				end
---			end
---		end
---	end
---end
-
---local function move_item(pos, stack)
---	local nvm = techage.get_nvm(pos)
---	local inv = M(pos):get_inventory()
---	if liquid.is_container_empty(stack:get_name()) then
---		fill_container(pos, inv, nvm)
---	else
---		empty_container(pos, inv, nvm)
---	end
---	M(pos):set_string("formspec", techage.fuel.formspec(nvm))
---end
-
---function techage.fuel.move_item(pos, stack, formspec)
---	local nvm = techage.get_nvm(pos)
---	local inv = M(pos):get_inventory()
---	if liquid.is_container_empty(stack:get_name()) then
---		fill_container(pos, inv, nvm)
---	else
---		empty_container(pos, inv, nvm)
---	end
---	M(pos):set_string("formspec", formspec(pos, nvm))
---end
-
---function techage.fuel.allow_metadata_inventory_put(pos, listname, index, stack, player)
---	if minetest.is_protected(pos, player:get_player_name()) then
---		return 0
---	end
---	if liquid.is_container_empty(stack:get_name()) then
---		return 1
---	end
---	local category = LQD(pos).fuel_cat
---	local ldef = liquid.get_liquid_def(stack:get_name())
---	if ldef and ValidOilFuels[ldef.inv_item] and ValidOilFuels[ldef.inv_item] <= category then
---		return 1
---	end
---	return 0
---end
-
---function techage.fuel.allow_metadata_inventory_take(pos, listname, index, stack, player)
---	if minetest.is_protected(pos, player:get_player_name()) then
---		return 0
---	end
---	return stack:get_count()
---end
-
---function techage.fuel.on_metadata_inventory_put(pos, listname, index, stack, player)
---	minetest.after(0.5, move_item, pos, stack)
---end
-
-function techage.fuel.can_dig(pos, player)
-	if minetest.is_protected(pos, player:get_player_name()) then
-		return false
-	end
-	local nvm = techage.get_nvm(pos)
-	nvm.liquid = nvm.liquid or {}
-	nvm.liquid.amount = nvm.liquid.amount or 0
-	local inv = M(pos):get_inventory()
-	return inv:is_empty("fuel") and nvm.liquid.amount == 0
-end
-
-function techage.fuel.on_rightclick(pos, node, clicker)
-	techage.set_activeformspec(pos, clicker)
-	local nvm = techage.get_nvm(pos)
-	M(pos):set_string("formspec", techage.fuel.formspec(nvm))
-end
-
---function techage.fuel.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)
---	nvm.countdown = 10
---	M(pos):set_string("formspec", techage.fuel.formspec(nvm))
---end
-
---function techage.fuel.formspec_update(pos, nvm)
---	if nvm.countdown and nvm.countdown > 0 then
---		nvm.countdown = nvm.countdown - 1
---		M(pos):set_string("formspec", techage.fuel.formspec(nvm))
---	end
---end
-
--- name is the fuel item name
-function techage.fuel.burntime(name)
-	if ValidOilFuels[name] then
-		return Burntime[name] or 0.01 -- not zero !
-	end
-	return 0.01 -- not zero !
-end
-
-function techage.fuel.valid_fuel(name, category)
-	return ValidOilFuels[name] and ValidOilFuels[name] <= category
-end
-
--- check if the given empty container can be replaced by a full
--- container and added to the players inventory
-local function fill(nvm, empty_container, item_count, puncher)
-	nvm.liquid = nvm.liquid or {}
-	nvm.liquid.amount = nvm.liquid.amount or 0
-	local full_container = liquid.get_full_container(empty_container, nvm.liquid.name)
-	if empty_container and full_container then
-		local item = ItemStack(full_container) -- to be added
-		local ldef = liquid.get_liquid_def(full_container)
-		if ldef and nvm.liquid.amount - ldef.size >= 0 then 
-			if item_count > 1 then -- can't be simply replaced?
-				-- check for extra free space
-				local inv = puncher:get_inventory()
-				if inv:room_for_item("main", item) then
-					-- add full container and return
-					-- the empty once - 1
-					inv:add_item("main", item)	
-					item = {name = empty_container, count = item_count - 1}
-				else
-					return -- no free space
-				end
-			end
-			nvm.liquid.amount = nvm.liquid.amount - ldef.size
-			if nvm.liquid.amount == 0 then 
-				nvm.liquid.name = nil 
-			end
-			return item -- to be added to the players inv.
-		end
-	end
-end
-
-local function empty(nvm, full_container)
-	nvm.liquid = nvm.liquid or {}
-	nvm.liquid.amount = nvm.liquid.amount or 0
-	local ldef = liquid.get_liquid_def(full_container)
-	if ldef and ValidOilFuels[ldef.inv_item] then
-		if not nvm.liquid.name or ldef.inv_item == nvm.liquid.name then
-			if nvm.liquid.amount + ldef.size <= CAPACITY then 
-				nvm.liquid.amount = nvm.liquid.amount + ldef.size
-				nvm.liquid.name = ldef.inv_item
-				return ItemStack(ldef.container)
-			end
-		end
-	end
-end
-
-function techage.fuel.on_punch(pos, node, puncher, pointed_thing)
-	local nvm = techage.get_nvm(pos)
-	local mem = techage.get_mem(pos)
-	mem.blocking_time = mem.blocking_time or 0
-	if mem.blocking_time > techage.SystemTime then
-		return
-	end
-	
-	local wielded_item = puncher:get_wielded_item():get_name()
-	local item_count = puncher:get_wielded_item():get_count()
-	local new_item = fill(nvm, wielded_item, item_count, puncher) 
-			or empty(nvm, wielded_item)
-	if new_item then
-		puncher:set_wielded_item(ItemStack(new_item))
-		M(pos):set_string("formspec", techage.fuel.formspec(pos, nvm))
-		mem.blocking_time = techage.SystemTime + BLOCKING_TIME
-		return
-	end
-end
diff --git a/oil/distiller.lua b/oil/distiller.lua
index 64d803f..2a33f50 100644
--- a/oil/distiller.lua
+++ b/oil/distiller.lua
@@ -41,7 +41,7 @@ local function after_place_node(pos, placer)
 end
 
 local function tubelib2_on_update2(pos, dir, tlib2, node)
-	liquid.update_network(pos)
+	liquid.update_network(pos, dir, tlib2)
 end
 
 local function after_dig_node(pos, oldnode, oldmetadata, digger)
diff --git a/oil/reboiler.lua b/oil/reboiler.lua
index 686dc4e..ed7f11d 100644
--- a/oil/reboiler.lua
+++ b/oil/reboiler.lua
@@ -96,6 +96,7 @@ local function start_node(pos)
 		if power.power_available(pos, Cable) then
 			nvm.running = true
 			power.consumer_start(pos, Cable, CYCLE_TIME)
+			minetest.get_node_timer(pos):start(CYCLE_TIME)
 		end
 	end
 end
@@ -105,14 +106,14 @@ local function node_timer(pos, elapsed)
 	nvm.liquid = nvm.liquid or {}
 	nvm.liquid.amount = nvm.liquid.amount or 0
 	
-	power.consumer_alive(pos, nvm)
+	power.consumer_alive(pos, Cable, CYCLE_TIME)
 	
 	if nvm.liquid.amount >= 5 and nvm.liquid.name == "techage:oil_source" then
 		nvm.liquid.amount = nvm.liquid.amount - 5
 		local leftover = pump_cmnd(pos, "put")
 		if (tonumber(leftover) or 1) > 0 then
 			nvm.liquid.amount = nvm.liquid.amount + 5
-			nvm.error = 25 -- = 5 pump cycles
+			nvm.error = 2 -- = 2 pump cycles
 			M(pos):set_string("infotext", S("TA3 Oil Reboiler: blocked"))
 			swap_node(pos, false)
 			return false
@@ -135,8 +136,9 @@ local function after_dig_node(pos, oldnode)
 end
 
 local function tubelib2_on_update2(pos, outdir, tlib2, node) 
-	if tlib2 == Pipe then
-		liquid.update_network(pos, outdir)
+	print("tubelib2_on_update2", tlib2.tube_type)
+	if tlib2.tube_type == "pipe2" then
+		liquid.update_network(pos, outdir, tlib2)
 	else
 		power.update_network(pos, outdir, tlib2)
 	end
@@ -196,6 +198,9 @@ minetest.register_node("techage:ta3_reboiler", {
 		local meta = M(pos)
 		meta:set_string("infotext", S("TA3 Oil Reboiler"))
 		meta:set_int("outdir", networks.side_to_outdir(pos, "R"))
+		local number = techage.add_node(pos, "techage:ta3_reboiler")
+		meta:set_string("node_number", number)
+		meta:set_string("owner", placer:get_player_name())
 		Pipe:after_place_node(pos)
 		power.after_place_node(pos)
 	end,
@@ -261,6 +266,33 @@ minetest.register_node("techage:ta3_reboiler_on", {
 Pipe:add_secondary_node_names({"techage:ta3_reboiler", "techage:ta3_reboiler_on"})
 Cable:add_secondary_node_names({"techage:ta3_reboiler", "techage:ta3_reboiler_on"})
 
+techage.register_node({"techage:ta3_reboiler", "techage:ta3_reboiler_on"}, {
+	on_recv_message = function(pos, src, topic, payload)
+		local nvm = techage.get_nvm(pos)
+		if topic == "on" then
+			start_node(pos)
+			return true
+		elseif topic == "off" then
+			swap_node(pos, false)
+			return true
+		elseif topic == "state" then
+			if nvm.error and nvm.error > 0 then
+				return "blocked"
+			elseif nvm.running then
+				return "running"
+			end
+			return "stopped"
+		else
+			return "unsupported"
+		end
+	end,
+	on_node_load = function(pos, node)
+		if node.name == "techage:ta3_reboiler_on" then
+			play_sound(pos)
+		end	
+	end,
+})
+
 minetest.register_craft({
 	output = "techage:ta3_reboiler",
 	recipe = {
diff --git a/power/distribution.lua b/power/distribution.lua
index d777980..2dbf146 100644
--- a/power/distribution.lua
+++ b/power/distribution.lua
@@ -126,7 +126,7 @@ function techage.power.power_distribution(network, tlib_type)
 	network.available2 = get_generator_sum(network.gen2, tlib_type)
 	network.needed1 = get_consumer_sum(network.con1, tlib_type)
 	network.needed2 = get_consumer_sum(network.con2, tlib_type)
-	print(network.available1, network.available2, network.needed1, network.needed2, network.alive)
+	--print(network.available1, network.available2, network.needed1, network.needed2, network.alive)
 	
 	-- store results
 	network.on = network.available1 + network.available2 >= network.needed1
diff --git a/sounds/techage_reactor.ogg b/sounds/techage_reactor.ogg
index 38d5538..27329b0 100644
Binary files a/sounds/techage_reactor.ogg and b/sounds/techage_reactor.ogg differ