diff --git a/basis/lib.lua b/basis/lib.lua
index d605784..d47f5ac 100644
--- a/basis/lib.lua
+++ b/basis/lib.lua
@@ -264,25 +264,6 @@ function techage.get_node_lvm(pos)
 	return {name="ignore", param2=0}
 end
 
---
--- Functions used to hide electric cable and biogas pipes
---
--- Overridden method of tubelib2!
-function techage.get_primary_node_param2(pos, dir)
-	local npos = vector.add(pos, tubelib2.Dir6dToVector[dir or 0])
-	local param2 = M(npos):get_int("tl2_param2")
-	if param2 ~= 0 then
-		return param2, npos
-	end
-end
-
--- Overridden method of tubelib2!
-function techage.is_primary_node(pos, dir)
-	local npos = vector.add(pos, tubelib2.Dir6dToVector[dir or 0])
-	local param2 = M(npos):get_int("tl2_param2")
-	return param2 ~= 0
-end
-
 function techage.is_air_like(name)
 	local ndef = minetest.registered_nodes[name]
 	if ndef and ndef.buildable_to then
@@ -598,3 +579,50 @@ function techage.set_expoints(player, ex_points)
 		end
 	end
 end
+
+-------------------------------------------------------------------------------
+-- Scheduler for a table-based, cyclic call of functions
+-------------------------------------------------------------------------------
+local TABLE_SIZE = 256
+techage.scheduler = {}
+
+local function add_to_table(tbl, i, func)
+	while i < TABLE_SIZE do
+		if not tbl[i] then
+			tbl[i] = func
+			return i + 1
+		end
+		i = i + 1
+	end
+	return i
+end
+
+function techage.scheduler.init(pos)
+	local mem = techage.get_mem(pos)
+	mem.sched_idx = 0
+end
+
+-- tFunc     : (empty) table of functions
+-- call_rate : (2,4,8,16,32,64 or 128)
+-- offset    : 0-128
+-- func      : function to be called
+function techage.scheduler.register(tFunc, call_rate, offset, func)
+	local i= 0
+	while i < TABLE_SIZE do
+		if (i % call_rate) == offset then
+			i = add_to_table(tFunc, i, func)
+		else
+			i = i + 1
+		end
+	end
+	return tFunc
+end
+
+-- tFunc   : table of functions
+-- default : default function (optional)
+-- Returns a function to be called be the callee
+function techage.scheduler.get(pos, tFunc, default)
+	local mem = techage.get_mem(pos)
+	mem.sched_idx = ((mem.sched_idx or 0) + 1) % TABLE_SIZE
+	return tFunc[mem.sched_idx] or default or function() end
+end
diff --git a/basis/submenu.lua b/basis/submenu.lua
index 5ee9fb2..4c248dc 100644
--- a/basis/submenu.lua
+++ b/basis/submenu.lua
@@ -221,7 +221,7 @@ end
 
 function techage.menu.generate_formspec(pos, ndef, form_def, player_name)
 	local meta = minetest.get_meta(pos)
-	local number = techage.get_node_number(pos)
+	local number = techage.get_node_number(pos) or "-"
 	local mem = techage.get_mem(pos)
 	mem.star = ((mem.star or 0) + 1) % 2
 	local star = mem.star == 1 and "*" or ""
diff --git a/fusion_reactor/controller.lua b/fusion_reactor/controller.lua
index 651b952..e3790ba 100644
--- a/fusion_reactor/controller.lua
+++ b/fusion_reactor/controller.lua
@@ -19,90 +19,172 @@ local M = minetest.get_meta
 local S = techage.S
 
 local Cable = techage.ElectricCable
+local sched = techage.scheduler
 local power = networks.power
 local control = networks.control
 
 local CYCLE_TIME = 2
-local STANDBY_TICKS = 3
-local COUNTDOWN_TICKS = 3
-local PWR_NEEDED = 4
+local STANDBY_TICKS = 0
+local COUNTDOWN_TICKS = 1
+local PWR_NEEDED = 400
+local EXPECTED_PLASMA_NUM = 56
+local EXPECTED_SHELL_NUM = 56
+local EXPECTED_MAGNET_NUM = 56
+local CALL_RATE1 = 16  -- 2s * 16 = 32s
+local CALL_RATE2 = 8  -- 2s * 8 = 16s
+local DESCRIPTION = S("TA5 Fusion Reactor Controller")
 
-local function concentrate(t)
-	local yes = 0
-	local no = 0
+local function count_trues(t)
+	local cnt = 0
 	for _,v in ipairs(t) do
 		if v then
-			yes = yes + 1
-		else
-			no = no + 1
+			cnt = cnt + 1
 		end
 	end
-	return yes .. " yes, " .. no .. " no"
+	return cnt
 end
 
 local function nucleus(t)
 	if #t == 4 then
 		if vector.equals(t[1], t[2]) and vector.equals(t[3], t[4]) then
-			return "ok"
+			return true
 		end
 	end
-	return "error"
-	
+	return S("Nucleus detection error")
 end
 
-local Commands = {
-	function(pos, outdir)
+local tSched = {}
+
+sched.register(tSched, CALL_RATE1, 0, function(pos, outdir)
+		local resp = control.request(pos, Cable, outdir, "con", "connect")
+		local cnt = count_trues(resp)
+		if cnt ~= EXPECTED_MAGNET_NUM then
+			return S("Magnet detection error\n(@1% found / 100% expected)", math.floor(cnt* 100 / EXPECTED_MAGNET_NUM))
+		end
+		return true
+	end)
+
+sched.register(tSched, CALL_RATE1, 1, function(pos, outdir)
 		local resp = control.request(pos, Cable, outdir, "con", "test_plasma")
-		return "test_plasma: " .. concentrate(resp)
-	end,
-	function(pos, outdir)
+		local cnt = count_trues(resp)
+		if cnt ~= EXPECTED_PLASMA_NUM then
+			return S("Tokamak shape error")
+		end
+		return true
+	end)
+
+sched.register(tSched, CALL_RATE1, 2, function(pos, outdir)
 		local resp = control.request(pos, Cable, outdir, "con", "test_shell")
-		return "test_shell: " .. concentrate(resp)
-	end,
-	function(pos, outdir)
-		local resp = control.request(pos, Cable, outdir, "con", "test_gas")
-		return "test_gas: " .. concentrate(resp)
-	end,
-	function(pos, outdir)
+		local cnt = count_trues(resp)
+		if cnt ~= EXPECTED_SHELL_NUM then
+			return S("Shell shape error\n(@1% found / 100% expected)", math.floor(cnt* 100 / EXPECTED_SHELL_NUM))
+		end
+		return true
+	end)
+
+sched.register(tSched, CALL_RATE1, 3, function(pos, outdir)
 		local resp = control.request(pos, Cable, outdir, "con", "test_nucleus")
-		return "test_nucleus: " .. nucleus(resp)
-	end,
-	function(pos, outdir)
-		local resp = control.send(pos, Cable, outdir, "con", "on")
-		return "on " .. resp
-	end,
-	function(pos, outdir)
-		local resp = control.send(pos, Cable, outdir, "con", "off")
-		return "off " .. resp
-	end,
-	function(pos, outdir)
-		local resp = control.request(pos, Cable, outdir, "con", "no_gas")
-		return "no_gas: " .. concentrate(resp)
-	end,
-}
+		return nucleus(resp)
+	end)
+
+sched.register(tSched, CALL_RATE2, 4, function(pos, outdir)
+		local resp = control.request(pos, Cable, outdir, "con", "inc_power")
+		local cnt = count_trues(resp)
+		print("inc_power", cnt)
+		if cnt < 52 then
+			return S("Cooling failed")
+		end
+		return true
+	end)
+
+--	function(pos, outdir)
+--		local resp = control.request(pos, Cable, outdir, "con", "no_gas")
+--		return "no_gas: " .. concentrate(resp)
+--	end,
+
+local function can_start(pos, nvm)
+	local outdir = networks.side_to_outdir(pos, "L")
+	if not power.power_available(pos, Cable, outdir) then
+		return S("No power")
+	end
+	outdir = networks.side_to_outdir(pos, "R")
+	control.request(pos, Cable, outdir, "con", "rst_power")
+	for i = 0,4 do
+		local res = tSched[i](pos, outdir)
+		if res ~= true then return res end
+	end
+	return true
+end
+
+local function start_node(pos, nvm)
+	sched.init(pos)
+	local outdir = networks.side_to_outdir(pos, "R")
+	control.send(pos, Cable, outdir, "con", "on")
+	sched.init(pos)
+end
+
+local function stop_node(pos, nvm)
+	local outdir = networks.side_to_outdir(pos, "R")
+	control.send(pos, Cable, outdir, "con", "off")
+end
+
+local function formspec(self, pos, nvm)
+	return "size[5,3]"..
+		"box[0,-0.1;4.8,0.5;#c6e8ff]" ..
+		"label[0.2,-0.1;" .. minetest.colorize( "#000000", DESCRIPTION) .. "]" ..
+		"image_button[2,1.5;1,1;".. self:get_state_button_image(nvm) ..";state_button;]"..
+		"tooltip[2,1.5;1,1;"..self:get_state_tooltip(nvm).."]"
+end
+
+local State = techage.NodeStates:new({
+	node_name_passive = "techage:ta5_fr_controller_pas",
+	node_name_active = "techage:ta5_fr_controller_act",
+	cycle_time = CYCLE_TIME,
+	infotext_name = DESCRIPTION,
+	standby_ticks = STANDBY_TICKS,
+	can_start = can_start,
+	start_node = start_node,
+	stop_node = stop_node,
+	formspec_func = formspec,
+})
 
 local function after_place_node(pos, placer, itemstack)
 	local nvm = techage.get_nvm(pos)
 	local meta = M(pos)
 	local own_num = techage.add_node(pos, "techage:ta5_fr_controller_pas")
-	meta:set_string("node_number", own_num)
+	State:node_init(pos, nvm, own_num)
 	meta:set_string("owner", placer:get_player_name())
-	meta:set_string("infotext", S("TA5 Fusion Reactor Controller") .. " " .. own_num)
-	minetest.get_node_timer(pos):start(CYCLE_TIME)
 	Cable:after_place_node(pos)
 end
 
+local function consume_power(pos, nvm, outdir)
+	if techage.needs_power(nvm) then
+		local taken = power.consume_power(pos, Cable, outdir, PWR_NEEDED)
+		if techage.is_running(nvm) then
+			if taken < PWR_NEEDED then
+				State:nopower(pos, nvm, "No power")
+				stop_node(pos, nvm)
+			else
+				return true  -- keep running
+			end
+		end
+	end
+end
+
 local function node_timer(pos)
 	local nvm = techage.get_nvm(pos)
 	local outdir = networks.side_to_outdir(pos, "L")
-	nvm.consumed = power.consume_power(pos, Cable, outdir, 1)
-
-	local mem = techage.get_mem(pos)
-	mem.idx = ((mem.idx or 0) % #Commands) + 1
-	outdir = networks.Flip[outdir]
-	local res = Commands[mem.idx](pos, outdir)
-	print(res)
-	return true
+	if consume_power(pos, nvm, outdir) then
+		local resp = sched.get(pos, tSched, function() 
+				return true end)(pos, networks.Flip[outdir])
+		if resp ~= true then
+			State:fault(pos, nvm, resp)
+			stop_node(pos, nvm)
+		else
+			State:keep_running(pos, nvm, COUNTDOWN_TICKS)
+		end
+	end
+	return State:is_active(nvm)
 end
 
 local function after_dig_node(pos, oldnode, oldmetadata)
@@ -111,6 +193,16 @@ local function after_dig_node(pos, oldnode, oldmetadata)
 	techage.del_mem(pos)
 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)
+	State:state_button_event(pos, nvm, fields)
+	--M(pos):set_string("formspec", formspec(State, pos, nvm))
+end
+
 minetest.register_node("techage:ta5_fr_controller_pas", {
 	description = S("TA5 Fusion Reactor Controller"),
 	tiles = {
@@ -119,12 +211,13 @@ minetest.register_node("techage:ta5_fr_controller_pas", {
 		"techage_filling_ta4.png^techage_frame_ta4_bottom.png",
 		"techage_filling_ta4.png^techage_frame_ta5.png^techage_appl_hole_electric.png",
 		"techage_filling_ta4.png^techage_frame_ta5.png^techage_appl_hole_electric.png",
-		"techage_filling_ta4.png^techage_frame_ta5.png",
+		"techage_filling_ta4.png^techage_appl_plasma.png^techage_frame_ta5.png",
 		"techage_filling_ta4.png^techage_appl_plasma.png^techage_frame_ta5.png",
 	},
 	after_place_node = after_place_node,
 	on_timer = node_timer,
 	after_dig_node = after_dig_node,
+	on_receive_fields = on_receive_fields,
 	drawtype = "nodebox",
 	paramtype2 = "facedir",
 	groups = {choppy=2, cracky=2, crumbly=2},
@@ -140,7 +233,16 @@ minetest.register_node("techage:ta5_fr_controller_act", {
 		"techage_filling_ta4.png^techage_frame_ta4_bottom.png",
 		"techage_filling_ta4.png^techage_frame_ta5.png^techage_appl_hole_electric.png",
 		"techage_filling_ta4.png^techage_frame_ta5.png^techage_appl_hole_electric.png",
-		"techage_filling_ta4.png^techage_frame_ta5.png",
+		{
+			image = "techage_filling4_ta4.png^techage_appl_plasma4.png^techage_frame4_ta5.png",
+			backface_culling = false,
+			animation = {
+				type = "vertical_frames",
+				aspect_w = 64,
+				aspect_h = 64,
+				length = 0.5,
+			},
+		},
 		{
 			image = "techage_filling4_ta4.png^techage_appl_plasma4.png^techage_frame4_ta5.png",
 			backface_culling = false,
@@ -155,9 +257,11 @@ minetest.register_node("techage:ta5_fr_controller_act", {
 	after_place_node = after_place_node,
 	on_timer = node_timer,
 	after_dig_node = after_dig_node,
+	on_receive_fields = on_receive_fields,
 	drawtype = "nodebox",
 	paramtype2 = "facedir",
-	groups = {choppy=2, cracky=2, crumbly=2},
+	groups = {choppy=2, cracky=2, crumbly=2, not_in_creative_inventory=1},
+	drop = "",
 	is_ground_content = false,
 	sounds = default.node_sound_metal_defaults(),
 })
diff --git a/fusion_reactor/gas_pipe.lua b/fusion_reactor/gas_pipe.lua
index 9f681e0..d698750 100644
--- a/fusion_reactor/gas_pipe.lua
+++ b/fusion_reactor/gas_pipe.lua
@@ -292,22 +292,40 @@ local names2 = networks.register_junction("techage:ta5_junctionpipe2", 1/8, Boxe
 liquid.register_nodes(names1, Pipe, "junc")
 liquid.register_nodes(names2, Pipe, "junc")
 
---minetest.register_craft({
---	output = "techage:ta3_junctionpipe25 2",
---	recipe = {
---		{"", "techage:ta3_pipeS", ""},
---		{"techage:ta3_pipeS", "", "techage:ta3_pipeS"},
---		{"", "techage:ta3_pipeS", ""},
---	},
---})
+minetest.register_craft({
+	output = "techage:ta5_pipe1S 6",
+	recipe = {
+		{'', '', "default:steel_ingot"},
+		{'', 'dye:blue', 'techage:ta4_carbon_fiber'},
+		{"", '', 'techage:aluminum'},
+	},
+})
 
---minetest.register_craft({
---	output = "techage:ta3_pipeS 6",
---	recipe = {
---		{'', '', "techage:iron_ingot"},
---		{'dye:yellow', 'default:steel_ingot', ''},
---		{"techage:iron_ingot", '', ''},
---	},
---})
+minetest.register_craft({
+	output = "techage:ta5_pipe2S 6",
+	recipe = {
+		{'', '', "default:steel_ingot"},
+		{'', 'dye:green', 'techage:ta4_carbon_fiber'},
+		{"", '', 'techage:aluminum'},
+	},
+})
+
+minetest.register_craft({
+	output = "techage:ta5_junctionpipe125 2",
+	recipe = {
+		{"", "techage:ta5_pipe1S", ""},
+		{"techage:ta5_pipe1S", "", "techage:ta5_pipe1S"},
+		{"", "techage:ta5_pipe1S", ""},
+	},
+})
+
+minetest.register_craft({
+	output = "techage:ta5_junctionpipe225 2",
+	recipe = {
+		{"", "techage:ta5_pipe2S", ""},
+		{"techage:ta5_pipe2S", "", "techage:ta5_pipe2S"},
+		{"", "techage:ta5_pipe2S", ""},
+	},
+})
 
 techage.GasPipe = Pipe
diff --git a/fusion_reactor/generator.lua b/fusion_reactor/generator.lua
index 4059465..fa21c49 100644
--- a/fusion_reactor/generator.lua
+++ b/fusion_reactor/generator.lua
@@ -19,8 +19,6 @@ local Cable = techage.ElectricCable
 local power = networks.power
 
 local CYCLE_TIME = 2
-local STANDBY_TICKS = 1
-local COUNTDOWN_TICKS = 2
 local PWR_PERF = 800
 
 local function swap_node(pos, name)
@@ -41,57 +39,42 @@ local function start_node(pos, nvm)
 	power.start_storage_calc(pos, Cable, outdir)
 	swap_node(pos, "techage:ta5_generator_on")
 	minetest.get_node_timer(pos):start(CYCLE_TIME)
-	--play_sound(pos)
 end
 
 local function stop_node(pos, nvm)
 	nvm.provided = 0
+	nvm.alive_cnt = 0
 	local outdir = M(pos):get_int("outdir")
-	--stop_sound(pos)
 	power.start_storage_calc(pos, Cable, outdir)
 	swap_node(pos, "techage:ta5_generator")
 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)
-	State:state_button_event(pos, nvm, fields)
-end
-
-local function on_rightclick(pos, node, clicker)
-	local nvm = techage.get_nvm(pos)
-	--techage.set_activeformspec(pos, clicker)
-	--M(pos):set_string("formspec", formspec(State, pos, nvm))
-end
-
 local function get_generator_data(pos, outdir, tlib2)
 	local nvm = techage.get_nvm(pos)
-	--if nvm.running and techage.is_running(nvm) then
+	if (nvm.alive_cnt or 0) > 0 then
 		return {level = (nvm.load or 0) / PWR_PERF, perf = PWR_PERF, capa = PWR_PERF * 2}
-	--end
+	end
 end
 
 local function node_timer(pos, elapsed)
 	local nvm = techage.get_nvm(pos)
 	nvm.alive_cnt = (nvm.alive_cnt or 0) - 1
-	print("node_timer", nvm.alive_cnt)
 	if nvm.alive_cnt > 0 then
 		local meta = M(pos)
 		local outdir = meta:get_int("outdir")
 		local tp1 = tonumber(meta:get_string("termpoint1"))
 		local tp2 = tonumber(meta:get_string("termpoint2"))
 		nvm.provided = power.provide_power(pos, Cable, outdir, PWR_PERF, tp1, tp2)
-		print("nvm.provided", nvm.provided)
 		local val = power.get_storage_load(pos, Cable, outdir, PWR_PERF)
 		if val > 0 then
 			nvm.load = val
 		end
+		return true
 	else
 		swap_node(pos, "techage:ta5_generator")
+		stop_node(pos, nvm)
+		return false
 	end
-	return true
 end
 
 minetest.register_node("techage:ta5_generator", {
@@ -106,7 +89,7 @@ minetest.register_node("techage:ta5_generator", {
 		"techage_filling_ta4.png^techage_frame_ta5.png^techage_appl_generator.png^[transformFX]",
 	},
 
-	after_place_node = function(pos)
+	after_place_node = function(pos, placer)
 		M(pos):set_int("outdir", networks.side_to_outdir(pos, "R"))
 		Cable:after_place_node(pos)
 	end,
@@ -116,9 +99,7 @@ minetest.register_node("techage:ta5_generator", {
 	end,
 
 	get_generator_data = get_generator_data,
-	ta3_formspec = techage.generator_settings("ta3", PWR_PERF),
-	--on_receive_fields = on_receive_fields,
-	--on_rightclick = on_rightclick,
+	ta4_formspec = techage.generator_settings("ta4", PWR_PERF),
 	paramtype2 = "facedir",
 	groups = {cracky=2, crumbly=2, choppy=2},
 	on_rotate = screwdriver.disallow,
@@ -157,9 +138,7 @@ minetest.register_node("techage:ta5_generator_on", {
 	},
 
 	get_generator_data = get_generator_data,
-	ta3_formspec = techage.generator_settings("ta3", PWR_PERF),
-	--on_receive_fields = on_receive_fields,
-	--on_rightclick = on_rightclick,
+	ta4_formspec = techage.generator_settings("ta4", PWR_PERF),
 	on_timer = node_timer,
 	paramtype2 = "facedir",
 	drop = "",
diff --git a/fusion_reactor/heatexchanger1.lua b/fusion_reactor/heatexchanger1.lua
index c6ca697..aacd3c4 100644
--- a/fusion_reactor/heatexchanger1.lua
+++ b/fusion_reactor/heatexchanger1.lua
@@ -34,7 +34,6 @@ end
 -- Send to the magnets
 local function control_cmnd(pos, topic)
 	local outdir = networks.side_to_outdir(pos, "L")
-	print("control_cmnd1", outdir, "tank", topic)
 	return control.request(pos, Pipe3, outdir, "tank", topic)
 end
 
diff --git a/fusion_reactor/heatexchanger2.lua b/fusion_reactor/heatexchanger2.lua
index 976f0f7..63f9065 100644
--- a/fusion_reactor/heatexchanger2.lua
+++ b/fusion_reactor/heatexchanger2.lua
@@ -21,13 +21,17 @@ local S = techage.S
 local Cable = techage.ElectricCable
 local power = networks.power
 local control = networks.control
+local sched = techage.scheduler
 
 local CYCLE_TIME = 2
 local PWR_NEEDED = 5
+local COUNTDOWN_TICKS = 1
 local DOWN = 5  -- dir
 local DESCRIPTION = S("TA5 Heat Exchanger")
 local EXPECT_BLUE = 56
 local EXPECT_GREEN = 52
+local CALL_RATE1 = 16  -- 2s * 16 = 32s
+local CALL_RATE2 = 8  -- 2s * 8 = 16s
 
 local function heatexchanger1_cmnd(pos, topic, payload)
 	return techage.transfer({x = pos.x, y = pos.y - 1, z = pos.z},
@@ -73,66 +77,77 @@ local function count_trues(t)
 	return cnt
 end
 
-local CheckCommands = {
-	function(pos)
-		if not power.power_available(pos, Cable, DOWN) then
-			return S("No power")
-		end
-		return true
-	end,
-	function(pos)
-		local resp = heatexchanger1_cmnd(pos, "test_gas_blue")
-		local cnt = count_trues(resp)
-		if cnt ~= EXPECT_BLUE then
-			return S("Blue pipe error (@1/@2)", cnt, EXPECT_BLUE)
-		end
-		return true
-	end,
-	function(pos)
-		local resp = heatexchanger3_cmnd(pos, "test_gas_green")
-		local cnt = count_trues(resp)
-		if cnt ~= EXPECT_GREEN then
-			return S("Green pipe error (@1/@2)", cnt, EXPECT_GREEN)
-		end
-		return true
-	end,
-	function(pos)
+local tSched = {}
+
+sched.register(tSched, CALL_RATE1, 0, function(pos)
 		if not heatexchanger1_cmnd(pos, "turbine") then
 			return S("Turbine error")
 		end
 		return true
-	end,
-	function(pos)
+	end)
+sched.register(tSched, CALL_RATE1, 1, function(pos)
 		if not heatexchanger3_cmnd(pos, "turbine") then
 			return S("Cooler error")
 		end
 		return true
-	end,
-}
+	end)
+sched.register(tSched, CALL_RATE1, 2, function(pos)
+		local resp = heatexchanger1_cmnd(pos, "test_gas_blue")
+		local cnt = count_trues(resp)
+		if cnt ~= EXPECT_BLUE then
+			return S("Blue pipe connection error\n(@1 found / @2 expected)", cnt, EXPECT_BLUE)
+		end
+		return true
+	end)
+sched.register(tSched, CALL_RATE1, 3, function(pos)
+		local resp = heatexchanger3_cmnd(pos, "test_gas_green")
+		local cnt = count_trues(resp)
+		if cnt ~= EXPECT_GREEN then
+			return S("Green pipe connection error\n(@1 found / @2 expected)", cnt, EXPECT_GREEN)
+		end
+		return true
+	end)
+sched.register(tSched, CALL_RATE2, 4, function(pos)
+		local resp = heatexchanger3_cmnd(pos, "dec_power")
+		local cnt = count_trues(resp)
+		print("dec_power", cnt)
+		if cnt < 52 then
+			return 0
+		end
+		return 1
+	end)
 
 local function can_start(pos, nvm)
-	for _,item in ipairs(CheckCommands) do
-		local res = item(pos)
-		if res ~= true then return res end
+	if not power.power_available(pos, Cable, DOWN) then
+		return S("No power")
+	end
+	heatexchanger3_cmnd(pos, "rst_power")
+	for i = 0,4 do
+		local res = tSched[i](pos)
+		if res ~= true and res ~= 1 then return res end
 	end
 	return true
 end
 
 local function start_node(pos, nvm)
 	play_sound(pos)
-	nvm.ticks = 0
-	nvm.temperature = 20
-	heatexchanger1_cmnd(pos, "start")
+	sched.init(pos)
+	nvm.temperature = nvm.temperature or 0
+	local mem = techage.get_mem(pos)
+	local t = minetest.get_gametime() - (mem.stopped_at or 0)
+	nvm.temperature = math.max(nvm.temperature - math.floor(t/2), 0)
+	nvm.temperature = math.min(nvm.temperature, 70)
 end
 
 local function stop_node(pos, nvm)
 	stop_sound(pos)
-	nvm.temperature = 20
 	heatexchanger1_cmnd(pos, "stop")
+	local mem = techage.get_mem(pos)
+	mem.stopped_at = minetest.get_gametime()
 end
 
 local function temp_indicator (nvm, x, y)
-	local temp = nvm.temperature or 20
+	local temp = techage.is_running(nvm) and nvm.temperature or 0
 	return "image["  .. x .. "," .. y .. ";1,2;techage_form_temp_bg.png^[lowpart:" ..
 		temp .. ":techage_form_temp_fg.png]" ..
 		"tooltip["  .. x .. "," .. y .. ";1,2;" .. S("water temperature") .. ";#0C3D32;#FFFFFF]"
@@ -147,15 +162,6 @@ local function formspec(self, pos, nvm)
 		"tooltip[3.2,1.5;1,1;"..self:get_state_tooltip(nvm).."]"
 end
 
-local function check_integrity(pos, nvm)
-	-- Check every 30 sec
-	nvm.ticks = ((nvm.ticks or 0) % 15) + 1
-	if CheckCommands[nvm.ticks] then
-		nvm.result = CheckCommands[nvm.ticks](pos)
-	end
-	return nvm.result
-end
-
 local State = techage.NodeStates:new({
 	node_name_passive = "techage:ta5_heatexchanger2",
 	cycle_time = CYCLE_TIME,
@@ -167,12 +173,35 @@ local State = techage.NodeStates:new({
 	formspec_func = formspec,
 })
 
+local function steam_management(pos, nvm)
+	local resp = sched.get(pos, tSched, function() return true end)(pos)
+	
+	if resp == 0 then  -- has no power
+		nvm.temperature = math.max(nvm.temperature - 10, 0)
+	elseif resp == 1 then  -- has power
+		nvm.temperature = math.min(nvm.temperature + 10, 100)
+	elseif resp ~= true then
+		State:fault(pos, nvm, resp)
+		stop_node(pos, nvm)
+		return false
+	end
+	
+	if nvm.temperature == 75 then
+		heatexchanger1_cmnd(pos, "stop")
+	elseif nvm.temperature == 80 then
+		heatexchanger1_cmnd(pos, "start")
+	elseif nvm.temperature > 80 then
+		heatexchanger1_cmnd(pos, "trigger")
+	end
+	return true
+end
+
 local function consume_power(pos, nvm)
 	if techage.needs_power(nvm) then
 		local taken = power.consume_power(pos, Cable, DOWN, PWR_NEEDED)
 		if techage.is_running(nvm) then
 			if taken < PWR_NEEDED then
-				State:nopower(pos, nvm, "No power")
+				State:nopower(pos, nvm, S("No power"))
 				stop_sound(pos)
 				heatexchanger1_cmnd(pos, "stop")
 			else
@@ -182,25 +211,19 @@ local function consume_power(pos, nvm)
 	end
 end
 
-local function steam_management(pos, nvm)
-	nvm.temperature = nvm.temperature or 20
-	nvm.temperature = math.min(nvm.temperature + 1, 100)
-	if nvm.temperature > 80 then 
-		heatexchanger1_cmnd(pos, "trigger")
-	end
-end
-
 local function node_timer(pos, elapsed)
 	local nvm = techage.get_nvm(pos)
-	nvm.temperature = nvm.temperature or 20
-	consume_power(pos, nvm)
-	if check_integrity(pos, nvm) == true then
-		steam_management(pos, nvm)
-	else
-		State:fault(pos, nvm, nvm.result)
-		stop_node(pos, nvm)
+	nvm.temperature = nvm.temperature or 0
+	print("node_timer", nvm.temperature)
+	if consume_power(pos, nvm) then
+		if steam_management(pos, nvm) then
+			State:keep_running(pos, nvm, COUNTDOWN_TICKS)
+		end
 	end
-	return State:is_active(nvm)
+	if techage.is_activeformspec(pos) then
+		M(pos):set_string("formspec", formspec(State, pos, nvm))
+	end
+	return State:is_active(nvm) or nvm.temperature > 0
 end
 
 local function can_dig(pos, player)
@@ -243,7 +266,7 @@ local function on_receive_fields(pos, formname, fields, player)
 
 	local nvm = techage.get_nvm(pos)
 	State:state_button_event(pos, nvm, fields)
-	M(pos):set_string("formspec", formspec(State, pos, nvm))
+	--M(pos):set_string("formspec", formspec(State, pos, nvm))
 end
 
 -- Middle node with the formspec from the bottom node
diff --git a/fusion_reactor/heatexchanger3.lua b/fusion_reactor/heatexchanger3.lua
index b0d6ad4..1c719a8 100644
--- a/fusion_reactor/heatexchanger3.lua
+++ b/fusion_reactor/heatexchanger3.lua
@@ -55,7 +55,6 @@ end
 -- Send to the magnets
 local function control_cmnd(pos, topic)
 	local outdir = networks.side_to_outdir(pos, "L")
-	print("control_cmnd3", outdir, "tank", topic)
 	return control.request(pos, Pipe3, outdir, "tank", topic)
 end
 
diff --git a/fusion_reactor/magnet.lua b/fusion_reactor/magnet.lua
index 851b594..c423ff6 100644
--- a/fusion_reactor/magnet.lua
+++ b/fusion_reactor/magnet.lua
@@ -119,7 +119,6 @@ liquid.register_nodes({"techage:ta5_magnet1", "techage:ta5_magnet2"}, Pipe, "tan
 local function check_plasma(pos, param2)
 	local pos1 = networks.get_relpos(pos, "F", param2)
 	local node = minetest.get_node(pos1) or {}
-	--techage.mark_position("singleplayer", pos1, "pos1", nil, 2)
 	return node.name == "air"
 end
 
@@ -157,36 +156,61 @@ local function on_receive(pos, tlib2, topic, payload)
 	end
 end
 
+local function rst_power(nvm)
+	nvm.power = 0
+	return true
+end
+
+local function inc_power(nvm)
+	nvm.power = nvm.power or 0
+	if nvm.power < 0 then nvm.power = 0 end
+	nvm.power = nvm.power + 1
+	return nvm.power <= 2
+end
+
+local function dec_power(nvm)
+	nvm.power = nvm.power or 0
+	if nvm.power > 0 then nvm.power = 0 end
+	nvm.power = nvm.power - 1
+	return nvm.power >= -2
+end
+
 local function on_request(pos, tlib2, topic)
-	--print("on_request", topic)
 	local nvm = techage.get_nvm(pos)
 	nvm.liquid = nvm.liquid or {}
 	nvm.liquid.amount = nvm.liquid.amount or 0
-	if topic == "test_power" and tlib2 == Cable then
-		nvm.has_power = true
-		return true
-	elseif topic == "test_gas_blue" and tlib2 == Pipe then
-		-- Test if gas is available
-		nvm.gas_cnt = 1
-		return nvm.liquid.amount == CAPACITY
-	elseif topic == "test_gas_green" and tlib2 == Pipe then
-		-- Test if gas is heated
-		nvm.gas_cnt = (nvm.gas_cnt or 0) - 1
-		local res = nvm.gas_cnt == 0 and nvm.has_power
-		nvm.has_power = false
-		return res
-	elseif topic == "no_gas" then
-		nvm.liquid.amount = 0
-		return true
-	elseif topic == "test_plasma" then
-		local node = minetest.get_node(pos) or {}
-		return check_plasma(pos, node.param2)
-	elseif topic == "test_shell" then
-		local node = minetest.get_node(pos) or {}
-		return check_shell(pos, node.param2)
-	elseif topic == "test_nucleus" then
-		local node = minetest.get_node(pos) or {}
-		return check_nucleus(pos, node.param2)
+	if tlib2 == Cable then
+		if topic == "connect" then
+			return true
+		elseif topic == "inc_power" then
+			return inc_power(nvm)
+		elseif topic == "test_plasma" then
+			local node = minetest.get_node(pos) or {}
+			return check_plasma(pos, node.param2)
+		elseif topic == "test_shell" then
+			local node = minetest.get_node(pos) or {}
+			return check_shell(pos, node.param2)
+		elseif topic == "test_nucleus" then
+			local node = minetest.get_node(pos) or {}
+			return check_nucleus(pos, node.param2)
+		elseif topic == "no_gas" then
+			nvm.liquid.amount = 0
+			return true
+		end
+	else  -- Pipe
+		if topic == "dec_power" then
+			return dec_power(nvm)
+		elseif topic == "test_gas_blue" then
+			nvm.has_gas = true
+			return nvm.liquid.amount == CAPACITY
+		elseif topic == "test_gas_green" then
+			local res = nvm.has_gas
+			nvm.has_gas = false
+			return res
+		end
+	end
+	if topic == "rst_power" then
+		return rst_power(nvm)
 	end
 	return false
 end
@@ -196,3 +220,47 @@ control.register_nodes({"techage:ta5_magnet1", "techage:ta5_magnet2"}, {
 		on_request = on_request,
 	}
 )
+
+minetest.register_craftitem("techage:ta5_magnet_blank", {
+	description = S("TA5 Fusion Reactor Magnet Blank"),
+	inventory_image = "techage_collider_magnet.png^techage_appl_hole_electric.png",
+})
+
+minetest.register_craftitem("techage:ta5_magnet_shield", {
+	description = S("TA5 Fusion Reactor Magnet Shield"),
+	inventory_image = "techage_steel_tiles.png",
+})
+
+techage.furnace.register_recipe({
+	output = "techage:ta5_magnet_shield 1",
+	recipe = {"default:steel_ingot", "techage:usmium_powder", "techage:graphite_powder"},
+	time = 2,
+
+})
+
+minetest.register_craft({
+	output = "techage:ta5_magnet_blank 2",
+	recipe = {
+		{'default:steel_ingot', 'techage:electric_cableS', 'techage:aluminum'},
+		{'techage:ta5_pipe1S', 'basic_materials:gold_wire', 'techage:ta5_pipe2S'},
+		{'techage:aluminum', 'dye:brown', 'default:steel_ingot'},
+	},
+})
+
+minetest.register_craft({
+	output = "techage:ta5_magnet1",
+	recipe = {
+		{'', 'techage:ta5_magnet_shield', 'techage:ta5_magnet_blank'},
+		{'', '', ''},
+		{'', '', ''},
+	},
+})
+
+minetest.register_craft({
+	output = "techage:ta5_magnet2",
+	recipe = {
+		{'', 'techage:ta5_magnet_shield', 'techage:ta5_magnet_blank'},
+		{'', '', 'techage:ta5_magnet_shield'},
+		{'', '', ''},
+	},
+})
diff --git a/items/powder.lua b/items/powder.lua
index 1ca6484..a75ab61 100644
--- a/items/powder.lua
+++ b/items/powder.lua
@@ -50,6 +50,12 @@ minetest.register_craftitem("techage:silver_sandstone_powder", {
 	groups = {powder = 1},
 })
 
+minetest.register_craftitem("techage:graphite_powder", {
+	description = S("Graphite Powder"),
+	inventory_image = "techage_powder_inv.png^[colorize:#000000:160",
+	groups = {powder = 1},
+})
+
 techage.add_grinder_recipe({input="default:acacia_bush_leaves", output="techage:leave_powder"})
 techage.add_grinder_recipe({input="default:acacia_leaves", output="techage:leave_powder"})
 techage.add_grinder_recipe({input="default:aspen_leaves", output="techage:leave_powder"})
@@ -62,4 +68,5 @@ techage.add_grinder_recipe({input="default:iron_lump", output="techage:iron_powd
 techage.add_grinder_recipe({input="default:clay", output="techage:clay_powder"})
 techage.add_grinder_recipe({input="techage:aluminum", output="techage:aluminum_powder"})
 techage.add_grinder_recipe({input="default:silver_sandstone", output="techage:silver_sandstone_powder"})
+techage.add_grinder_recipe({input="default:coal_lump", output="techage:graphite_powder"})
 
diff --git a/ta3_power/tiny_generator.lua b/ta3_power/tiny_generator.lua
index 4ee931b..db82c46 100644
--- a/ta3_power/tiny_generator.lua
+++ b/ta3_power/tiny_generator.lua
@@ -166,7 +166,7 @@ end
 
 local function get_generator_data(pos, outdir, tlib2)
 	local nvm = techage.get_nvm(pos)
-	if nvm.running and techage.is_running(nvm) then
+	if techage.is_running(nvm) then
 		return {level = (nvm.load or 0) / PWR_PERF, perf = PWR_PERF, capa = PWR_PERF * 2}
 	end
 end
@@ -190,7 +190,6 @@ minetest.register_node("techage:tiny_generator", {
 	after_place_node = function(pos, placer, itemstack)
 		local nvm = techage.get_nvm(pos)
 		local number = techage.add_node(pos, "techage:tiny_generator")
-		nvm.running = false
 		nvm.burn_cycles = 0
 		if itemstack then
 			local stack_meta = itemstack:get_meta()
diff --git a/textures/shrink.sh b/textures/shrink.sh
deleted file mode 100755
index be401b8..0000000
--- a/textures/shrink.sh
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/bin/bash
-pngquant --skip-if-larger --quality=70-90 --strip *.png --ext .png --force
\ No newline at end of file
diff --git a/textures/techage_filling4_ta3.png b/textures/techage_filling4_ta3.png
index 74c33a6..4576f68 100644
Binary files a/textures/techage_filling4_ta3.png and b/textures/techage_filling4_ta3.png differ
diff --git a/textures/techage_filling8_ta3.png b/textures/techage_filling8_ta3.png
index 3802a64..74739a3 100644
Binary files a/textures/techage_filling8_ta3.png and b/textures/techage_filling8_ta3.png differ
diff --git a/textures/techage_filling_ta3.png b/textures/techage_filling_ta3.png
index 0cd5219..fe5a214 100644
Binary files a/textures/techage_filling_ta3.png and b/textures/techage_filling_ta3.png differ
diff --git a/textures/techage_filling_ta4.png b/textures/techage_filling_ta4.png
index 8612391..8d0a03d 100644
Binary files a/textures/techage_filling_ta4.png and b/textures/techage_filling_ta4.png differ
diff --git a/textures/techage_plasma.png b/textures/techage_plasma.png
new file mode 100644
index 0000000..1e7cf86
Binary files /dev/null and b/textures/techage_plasma.png differ
diff --git a/textures/techage_reactor_shell.png b/textures/techage_reactor_shell.png
index 5298192..52165c9 100644
Binary files a/textures/techage_reactor_shell.png and b/textures/techage_reactor_shell.png differ
diff --git a/tools/repairkit.lua b/tools/repairkit.lua
index 2ebd5b3..2622a47 100644
--- a/tools/repairkit.lua
+++ b/tools/repairkit.lua
@@ -114,14 +114,6 @@ local function read_state(itemstack, user, pointed_thing)
 				itemstack:add_wear(65636/200)
 				return itemstack
 			end
-		elseif node.name == "techage:ta5_magnet1" or node.name == "techage:ta5_magnet2" then
-			local ctl = CTL(pos)
-			local has_gas = ctl.on_request(pos, nil, "test_gas") and S("yes") or S("no")
-			local has_power = ctl.on_request(pos, nil, "test_power") and S("yes") or S("no")
-			minetest.chat_send_player(user:get_player_name(), S("Power: @1, Cooling: @2", has_power, has_gas))
-			minetest.chat_send_player(user:get_player_name(), S("Position")..": "..minetest.pos_to_string(pos).."    ")
-			itemstack:add_wear(65636/200)
-			return itemstack
 		elseif ndef and ndef.description then
 			if ndef.techage_info then
 				local info = ndef.techage_info(pos) or ""