diff --git a/api/controller.lua b/api/controller.lua
index 4e9ef54..de9de65 100644
--- a/api/controller.lua
+++ b/api/controller.lua
@@ -12,8 +12,6 @@ local function get_controller_formspec(pos)
     "button[5.6,0.6;3,0.8;"..SET_BUTTON..";Set]"
 end
 
-
-
 local function show_controller_formspec(pos, playerName)
   local pInfo = {}
   pInfo.position = pos
@@ -37,7 +35,12 @@ local function on_controller_receive_fields(player, formname, fields)
   return true
 end
 
+local function after_controller_place(pos)
+  logistica.start_controller_timer(pos)
+end
+
 -- registration stuff
+
 minetest.register_on_player_receive_fields(on_controller_receive_fields)
 
 --[[
@@ -52,7 +55,7 @@ minetest.register_on_player_receive_fields(on_controller_receive_fields)
 
   tier may be `nil` which will result in the controller connecting to everything
 ]]
-function logistica.register_controller(simpleName, def, tier)
+function logistica.register_controller(name, def, tier)
   local controller_group = nil
   if not tier then
     tier = logistica.TIER_ALL
@@ -62,7 +65,7 @@ function logistica.register_controller(simpleName, def, tier)
     logistica.tiers[ltier] = true
     controller_group = logistica.get_machine_group(ltier)
   end
- 	local controller_name = "logistica:" .. string.lower(simpleName:gsub(" ", "_")) .. "_controller"
+ 	local controller_name = "logistica:" .. string.lower(name:gsub(" ", "_"))
 	logistica.controllers[controller_name] = tier
 
   local on_construct = function(pos)
@@ -70,15 +73,16 @@ function logistica.register_controller(simpleName, def, tier)
       logistica.on_controller_change(pos, nil)
   end
   local after_destruct = logistica.on_controller_change
-  local on_timer = logistica.on_controller_timer
 
   if not def.groups then
     def.groups = {}
   end
   def.groups[controller_group] = 1
+  def.groups[logistica.TIER_CONTROLLER] = 1
+  def.on_timer = logistica.on_controller_timer
   def.on_construct = on_construct
   def.after_destruct = after_destruct
-  def.on_timer = logistica.on_timer_powered(on_timer)
+  def.after_place_node = after_controller_place
   def.drop = controller_name
   def.on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
     if clicker and clicker:is_player() then
@@ -101,7 +105,7 @@ function logistica.register_controller(simpleName, def, tier)
 	minetest.register_node(controller_name.."_disabled", def_disabled)
 end
 
-logistica.register_controller("Simple Controller", {
+logistica.register_controller("simple_controller", {
   description = "Simple Controller",
   tiles = { "logistica_silver_cable.png" },
   groups = {
diff --git a/api/supplier.lua b/api/supplier.lua
index cf7b126..b41c21c 100644
--- a/api/supplier.lua
+++ b/api/supplier.lua
@@ -1,24 +1,21 @@
 
-local NUM_SUPPLY_SLOTS = 8
-local PULL_LIST_PICKER = "pull_pick"
-local ON_OFF_BUTTON = "on_off_btn"
 local FORMSPEC_NAME = "logistica_supplier"
+local ON_OFF_BUTTON = "on_off_btn"
 
 local supplierForms = {}
 
 local function get_supplier_formspec(pos)
   local posForm = "nodemeta:"..pos.x..","..pos.y..","..pos.z
-  local pushPos = logistica.get_supplier_target(pos)
-  local selectedList =  logistica.get_supplier_target_list(pos)
   local isOn = logistica.is_machine_on(pos)
+
   return "formspec_version[4]" ..
-    "size[10.6,8]" ..
+    "size[10.5,12]" ..
     logistica.ui.background..
-    logistica.ui.pull_list_picker(PULL_LIST_PICKER, 6.7, 0.7, pushPos, selectedList, "Supply from:")..
-    logistica.ui.on_off_btn(isOn, 9.3, 0.5, ON_OFF_BUTTON, "Enable")..
-    "label[0.6,1.2;Items to make available as Supply. If left empty, nothing is supplied]"..
-    "list["..posForm..";filter;0.5,1.5;"..NUM_SUPPLY_SLOTS..",1;0]"..
-    "list[current_player;main;0.5,3;8,4;0]"
+    logistica.ui.on_off_btn(isOn, 9.0, 0.3, ON_OFF_BUTTON, "Enable")..
+    "label[0.6,1.0;Passive Supplier: Items become available to network requests.]"..
+    "list["..posForm..";main;0.4,1.4;8,4;0]"..
+    "list[current_player;main;0.4,7.0;8,4;0]"..
+    "listring[]"
 end
 
 local function show_supplier_formspec(playerName, pos)
@@ -40,13 +37,6 @@ local function on_player_receive_fields(player, formname, fields)
     if not pos then return false end
     logistica.toggle_machine_on_off(pos)
     show_supplier_formspec(player:get_player_name(), pos)
-  elseif fields[PULL_LIST_PICKER] then
-    local selected = fields[PULL_LIST_PICKER]
-    if logistica.is_allowed_pull_list(selected) then
-      local pos = supplierForms[playerName].position
-      if not pos then return false end
-      logistica.set_supplier_target_list(pos, selected)
-    end
   end
   return true
 end
@@ -56,40 +46,32 @@ local function on_supplier_rightclick(pos, node, clicker, itemstack, pointed_thi
   show_supplier_formspec(clicker:get_player_name(), pos)
 end
 
-local function after_place_supplier(pos, placer, itemstack, numRequestSlots)
+local function after_place_supplier(pos, placer, itemstack)
   local meta = minetest.get_meta(pos)
-  if placer and placer:is_player() then
-	  meta:set_string("owner", placer:get_player_name())
-  end
-  logistica.toggle_machine_on_off(pos)
-  logistica.set_supplier_target_list(pos, "dst")
 	local inv = meta:get_inventory()
-	inv:set_size("filter", numRequestSlots)
+	inv:set_size("main", logistica.get_supplier_inv_size(pos))
+  logistica.set_node_tooltip_from_state(pos)
   logistica.on_supplier_change(pos)
 end
 
 local function allow_supplier_storage_inv_put(pos, listname, index, stack, player)
-  if listname ~= "filter" then return 0 end
-  local inv = minetest.get_meta(pos):get_inventory()
-  local newStack = ItemStack(stack)
-  newStack:set_count(1)
-  inv:set_stack(listname, index, newStack)
-  logistica.update_cache_at_pos(pos, LOG_CACHE_SUPPLIER)
-  return 0
+  return stack:get_count()
 end
 
 local function allow_supplier_inv_take(pos, listname, index, stack, player)
-  if listname ~= "filter" then return 0 end
-  local inv = minetest.get_meta(pos):get_inventory()
-  local slotStack = inv:get_stack(listname, index)
-  slotStack:take_item(stack:get_count())
-  inv:set_stack(listname, index, slotStack)
-  logistica.update_cache_at_pos(pos, LOG_CACHE_SUPPLIER)
-  return 0
+  return stack:get_count()
 end
 
 local function allow_supplier_inv_move(pos, from_list, from_index, to_list, to_index, count, player)
-  return 0
+  return count
+end
+
+local function on_suppler_inventory_put(pos, listname, index, stack, player)
+  logistica.update_cache_at_pos(pos, LOG_CACHE_SUPPLIER)
+end
+
+local function on_suppler_inventory_take(pos, listname, index, stack, player)
+  logistica.update_cache_at_pos(pos, LOG_CACHE_SUPPLIER)
 end
 
 ----------------------------------------------------------------
@@ -102,41 +84,34 @@ minetest.register_on_player_receive_fields(on_player_receive_fields)
 -- Public Registration API
 ----------------------------------------------------------------
 -- `simpleName` is used for the description and for the name (can contain spaces)
--- `maxTransferRate` indicates how many nodes at a time this supplier can take when asked
-function logistica.register_supplier(simpleName, maxTransferRate)
-  local lname = string.lower(simpleName:gsub(" ", "_"))
-  local supplier_name = "logistica:supplier_"..lname
+-- `inventorySize` should be 32 at max (aka regular chest)
+function logistica.register_supplier(desc, name, inventorySize, tiles)
+  local lname = string.lower(name:gsub(" ", "_"))
+  local supplier_name = "logistica:passive_supplier_"..lname
   logistica.suppliers[supplier_name] = true
   local grps = {oddly_breakable_by_hand = 3, cracky = 3 }
   grps[logistica.TIER_ALL] = 1
   local def = {
-    description = simpleName.." Supplier",
+    description = desc,
     drawtype = "normal",
-    tiles = {
-      "logistica_"..lname.."_supplier_side.png^[transformR270",
-      "logistica_"..lname.."_supplier_side.png^[transformR90",
-      "logistica_"..lname.."_supplier_side.png^[transformR180",
-      "logistica_"..lname.."_supplier_side.png",
-      "logistica_"..lname.."_supplier_back.png",
-      "logistica_"..lname.."_supplier_front.png",
-    },
+    tiles = tiles,
     paramtype = "light",
     paramtype2 = "facedir",
     is_ground_content = false,
     groups = grps,
     drop = supplier_name,
     sounds = logistica.node_sound_metallic(),
-    after_place_node = function (pos, placer, itemstack)
-      after_place_supplier(pos, placer, itemstack, NUM_SUPPLY_SLOTS)
-    end,
+    after_place_node = after_place_supplier,
     after_destruct = logistica.on_supplier_change,
     on_rightclick = on_supplier_rightclick,
     allow_metadata_inventory_put = allow_supplier_storage_inv_put,
     allow_metadata_inventory_take = allow_supplier_inv_take,
     allow_metadata_inventory_move = allow_supplier_inv_move,
+    on_metadata_inventory_put = on_suppler_inventory_put,
+    on_metadata_inventory_take = on_suppler_inventory_take,
     logistica = {
-      supplier_transfer_rate = maxTransferRate,
-      on_power = function() end,  -- necessary for power toggle to work
+      inventory_size = inventorySize,
+      on_power = function(pos, power) logistica.set_node_tooltip_from_state(pos, nil, power) end
     }
   }
 
@@ -159,5 +134,11 @@ function logistica.register_supplier(simpleName, maxTransferRate)
 
 end
 
-logistica.register_supplier("Item", 1)
-logistica.register_supplier("Stack", 99)
+logistica.register_supplier("Passive Supplier", "simple", 32, {
+      "logistica_passive_supplier_top.png",
+      "logistica_passive_supplier_bottom.png",
+      "logistica_passive_supplier_side.png^[transformFX",
+      "logistica_passive_supplier_side.png",
+      "logistica_passive_supplier_side.png",
+      "logistica_passive_supplier_front.png",
+}) -- default supplier
diff --git a/logic/controller.lua b/logic/controller.lua
index 7790e05..ce1dbaf 100644
--- a/logic/controller.lua
+++ b/logic/controller.lua
@@ -1,42 +1,19 @@
---[[
-Outline of controller tick/s:
-1. Gather request from each requester, add them to queue
-   - smart queue needed, unify request per requester
-2. For the first N requests, check each supplier and if applicable fulfil request
-3. Gather all storage slots
-  - cached, hopefully
-4. For each storage slot, check each supplier, and pull up to S items per slot into storage
-]]
 
-local TIMER_DURATION_SHORT = 0.5
-local TIMER_DURATION_LONG = 2.0
+local TIMER_DURATION_LONG = 5
 
 function logistica.start_controller_timer(pos, duration)
   if duration == nil then duration = TIMER_DURATION_LONG end
-  local timer = minetest.get_node_timer(pos)
-  timer:start(duration)
+  logistica.start_node_timer(pos, duration)
 end
 
 function logistica.on_controller_timer(pos, elapsed)
-  if pos then return false end -- 
-  local node = minetest.get_node(pos)
-  if not node then return false end -- what?
-  if node.name:find("_disabled") then return false end  -- disabled controllers don't do anything
-
-  local had_demand = false
+  local node = minetest.get_node_or_nil(pos)
+  if not node then return true end -- what?
+  if not logistica.is_controller(node.name) then return false end
 
   local network = logistica.get_network_or_nil(pos)
   if not network then
-    logistica.on_controller_change(pos, nil) -- this should re-scan the network
+    logistica.on_controller_change(pos) -- this should re-scan the network
   end
-  network = logistica.get_network_or_nil(pos)
-  if not network then return true end  -- something went wrong, retry again
-
-  if had_demand then
-    logistica.start_controller_timer(pos, TIMER_DURATION_SHORT)
-  else
-    logistica.start_controller_timer(pos, TIMER_DURATION_LONG)
-  end
-
-  return false
+  return true
 end
diff --git a/logic/groups.lua b/logic/groups.lua
index 78076d2..039f0bd 100644
--- a/logic/groups.lua
+++ b/logic/groups.lua
@@ -10,6 +10,7 @@ logistica.item_storage = {}
 logistica.tiers = {}
 logistica.TIER_ALL = "logistica_all_tiers"
 logistica.GROUP_ALL = "group:" .. logistica.TIER_ALL
+logistica.TIER_CONTROLLER = "controller"
 
 function logistica.get_cable_group(tier)
   return "logistica_" .. tier .. "_cable"
diff --git a/logic/injector.lua b/logic/injector.lua
index be7de2e..c241371 100644
--- a/logic/injector.lua
+++ b/logic/injector.lua
@@ -38,12 +38,9 @@ function logistica.start_injector_timer(pos)
 end
 
 function logistica.on_injector_timer(pos, elapsed)
+  if not logistica.is_machine_on(pos) then return false end
   local networkId = logistica.get_network_id_or_nil(pos)
-  if not networkId then
-    logistica.toggle_machine_on_off(pos)
-    logistica.set_node_tooltip_from_state(pos)
-    return false
-  end
+  if not networkId then return false end
 
   logistica.set_node_tooltip_from_state(pos)
   local node = minetest.get_node_or_nil(pos)
diff --git a/logic/network_cache.lua b/logic/network_cache.lua
index b694b09..131a4ee 100644
--- a/logic/network_cache.lua
+++ b/logic/network_cache.lua
@@ -10,7 +10,7 @@ LOG_CACHE_MASS_STORAGE = {
   nodes = function (network) return network.mass_storage end,
 }
 LOG_CACHE_SUPPLIER = {
-  listName = "filter",
+  listName = "main",
   clear = function (network) network.supplier_cache = {} end,
   cache = function (network) return network.supplier_cache end,
   nodes = function (network) return network.suppliers end,
@@ -38,7 +38,11 @@ end
 
 local function list_to_cache_nameset(list)
   local ret = {}
-  for i, item in ipairs(list) do ret[item:get_name()] = true end
+  for i, item in ipairs(list) do
+    if item:get_name() ~= "" then
+      ret[item:get_name()] = true
+    end
+  end
   return ret
 end
 
@@ -90,10 +94,12 @@ local function update_network_cache(network, cacheOps)
     logistica.load_position(storagePos)
     local nodeMeta = get_meta(storagePos)
     local list = nodeMeta:get_inventory():get_list(listName) or {}
-    for _, itemStack in pairs(list) do
+    for _, itemStack in ipairs(list) do
       local name = itemStack:get_name()
-      if not cache[name] then cache[name] = {} end
-      cache[name][hash] = true
+      if name ~= "" then
+        if not cache[name] then cache[name] = {} end
+        cache[name][hash] = true
+      end
     end
     save_prev_cache(nodeMeta, listName, list_to_cache_nameset(list))
   end
@@ -112,12 +118,12 @@ local function update_network_cache_for_pos(pos, cacheOps)
   local cache = cacheOps.cache(network)
   local remAndAdd = diff(prevCacheItems, currCacheItems)
   for name, _ in pairs(remAndAdd[1]) do
-    local posCache = cache[name]
-    if posCache then posCache[hash] = nil end
+    if cache[name] then cache[name][hash] = nil end
+    if logistica.table_is_empty(cache[name]) then cache[name] = nil end
   end
   for name, _ in pairs(remAndAdd[2]) do
-    local posCache = cache[name]
-    if posCache then posCache[hash] = true end
+    if not cache[name] then cache[name] = {} end
+    if cache[name] then cache[name][hash] = true end
   end
   save_prev_cache(meta, listName, currCacheItems)
 end
diff --git a/logic/network_storage.lua b/logic/network_storage.lua
index b22156c..a5d3347 100644
--- a/logic/network_storage.lua
+++ b/logic/network_storage.lua
@@ -1,17 +1,30 @@
 
 local MASS_STORAGE_LIST_NAME = "storage"
 local ITEM_STORAGE_LIST_NAME = "main"
+local SUPPLIER_LIST_NAME = "main"
 
 local function get_meta(pos)
   logistica.load_position(pos)
   return minetest.get_meta(pos)
 end
 
+local function updateSupplierCacheFor(supplierPosList)
+  for _, pos in ipairs(supplierPosList) do
+    logistica.update_cache_at_pos(pos, LOG_CACHE_SUPPLIER)
+  end
+end
+
 -- tries to take a stack from the network locations
 -- calls the collectorFunc with the stack - collectorFunc needs to return how many were left-over<br>
 -- `collectorFunc = function(stackToInsert)`<br>
 -- note that it may be called multiple times as the itemstack is gathered from mass storage
 function logistica.take_stack_from_network(stackToTake, network, collectorFunc, isAutomatedRequest)
+  if not network then return false end
+  -- first check suppliers
+  if logistica.take_stack_from_suppliers(stackToTake, network, collectorFunc, isAutomatedRequest) then
+    return
+  end
+  -- then check storages
   if stackToTake:get_stack_max() <= 1 then
     logistica.take_stack_from_item_storage(stackToTake, network, collectorFunc, isAutomatedRequest)
   else
@@ -19,6 +32,52 @@ function logistica.take_stack_from_network(stackToTake, network, collectorFunc,
   end
 end
 
+-- tries to take the given stack from the passive suppliers on the network
+-- calls the collectorFunc with the stack when necessary
+-- note that it may be called multiple times as the itemstack is gathered from mass storage
+function logistica.take_stack_from_suppliers(stackToTake, network, collectorFunc, isAutomatedRequest)
+  local requestedAmount = stackToTake:get_count()
+  local remaining = requestedAmount
+  local stackName = stackToTake:get_name()
+  local validSupplers = network.supplier_cache[stackName] or {}
+  local modifiedPos = {}
+  for hash, _ in pairs(validSupplers) do
+    local supplierPos = minetest.get_position_from_hash(hash)
+    local supplierInv = get_meta(supplierPos):get_inventory()
+    local machineIsOn = logistica.is_machine_on(supplierPos)
+    local supplyList = (machineIsOn and supplierInv:get_list(SUPPLIER_LIST_NAME)) or {}
+    for i, supplyStack in ipairs(supplyList) do
+    if supplyStack:get_name() == stackName then
+      table.insert(modifiedPos, supplierPos)
+      local supplyCount = supplyStack:get_count()
+      if supplyCount >= remaining then -- enough to fulfil requested
+        local toSend = ItemStack(supplyStack) ; toSend:set_count(remaining)
+        local leftover = collectorFunc(toSend)
+        supplyStack:set_count(supplyCount - remaining + leftover)
+        supplierInv:set_stack(SUPPLIER_LIST_NAME, i, supplyStack)
+        updateSupplierCacheFor(modifiedPos)
+        return true
+      else -- not enough to fulfil requested
+        local toSend = ItemStack(supplyStack)
+        local leftover = collectorFunc(toSend)
+        remaining = remaining - (supplyCount - leftover)
+        supplyStack:set_count(leftover)
+        if leftover > 0 then -- for some reason we could not insert all - exit early
+          supplierInv:set_stack(SUPPLIER_LIST_NAME, i, supplyStack)
+          updateSupplierCacheFor(modifiedPos)
+          return true
+        end
+      end
+    end
+    end
+    -- if we get there, we did not fulfil the request from this supplier
+    -- but some items still may have been inserted
+    if machineIsOn then supplierInv:set_list(SUPPLIER_LIST_NAME, supplyList) end
+  end
+  updateSupplierCacheFor(modifiedPos)
+  return false
+end
+
 -- calls the collectorFunc with the stack - collectorFunc needs to return how many were left-over<br>
 -- `collectorFunc = function(stackToInsert)`<br>
 -- returns true if item successfully found and given to collector, false otherwise
diff --git a/logic/requester.lua b/logic/requester.lua
index 48ca804..69ec66c 100644
--- a/logic/requester.lua
+++ b/logic/requester.lua
@@ -139,12 +139,9 @@ function logistica.start_requester_timer(pos, duration)
 end
 
 function logistica.on_requester_timer(pos, elapsed)
+  if not logistica.is_machine_on(pos) then return false end
   local network = logistica.get_network_or_nil(pos)
-  if not network then
-    logistica.toggle_machine_on_off(pos)
-    logistica.set_node_tooltip_from_state(pos)
-    return false
-  end
+  if not network then return false end
   logistica.set_node_tooltip_from_state(pos)
   update_requester_actual_request(pos)
   if take_requested_items_from_network(pos, network) then
diff --git a/logic/supplier.lua b/logic/supplier.lua
index 8d1c7fe..459e30d 100644
--- a/logic/supplier.lua
+++ b/logic/supplier.lua
@@ -1,34 +1,12 @@
 
-local META_SUPPLIER_LISTNAME = "suptarlist"
+local META_SUPPLIER_LIST = "main"
 
-function logistica.get_supplier_target(pos)
-  local node = minetest.get_node_or_nil(pos)
-  if not node then return nil end
-  local shift = logistica.get_rot_directions(node.param2).backward
-  if not shift then return nil end
-  return {x = (pos.x + shift.x),
-          y = (pos.y + shift.y),
-          z = (pos.z + shift.z)}
-end
-
-function logistica.get_supplier_target_list(pos)
-  logistica.load_position(pos)
-  local meta = minetest.get_meta(pos)
-  return meta:get_string(META_SUPPLIER_LISTNAME)
-end
-
-function logistica.set_supplier_target_list(pos, listName)
-  logistica.load_position(pos)
-  local meta = minetest.get_meta(pos)
-  meta:set_string(META_SUPPLIER_LISTNAME, listName)
-end
-
-function logistica.get_supplier_max_item_transfer(pos)
+function logistica.get_supplier_inv_size(pos)
   local node = minetest.get_node_or_nil(pos)
   if not node then return 0 end
   local def = minetest.registered_nodes[node.name]
-  if def and def.logistica and def.logistica.supplier_transfer_rate then
-    return def.logistica.supplier_transfer_rate
+  if def and def.logistica and def.logistica.inventory_size then
+    return def.logistica.inventory_size
   else
     return 0
   end
@@ -39,15 +17,6 @@ function logistica.take_item_from_supplier(pos, stack)
   logistica.load_position(pos)
   if not logistica.is_machine_on(pos) then return ItemStack("") end
   local meta = minetest.get_meta(pos)
-  local canTake = math.min(stack:get_count(), logistica.get_supplier_max_item_transfer(pos))
-  local copyStack = ItemStack(stack)
-  copyStack:set_count(canTake)
-
-  local targetListName = meta:get_string(META_SUPPLIER_LISTNAME)
-  local targetPos = logistica.get_supplier_target(pos)
-  logistica.load_position(targetPos)
-  local targetInv = minetest.get_meta(targetPos):get_inventory()
-  local targetList = targetInv:get_list(targetListName)
-  if not targetList then copyStack:set_count(0); return copyStack end
-  return targetInv:remove_item(targetListName, copyStack)
+  local inv = meta:get_inventory()
+  return inv:remove_item(META_SUPPLIER_LIST, stack)
 end
diff --git a/textures/logistica_item_supplier_back.png b/textures/logistica_item_supplier_back.png
deleted file mode 100644
index 676c703..0000000
Binary files a/textures/logistica_item_supplier_back.png and /dev/null differ
diff --git a/textures/logistica_item_supplier_front.png b/textures/logistica_item_supplier_front.png
deleted file mode 100644
index 1c22f47..0000000
Binary files a/textures/logistica_item_supplier_front.png and /dev/null differ
diff --git a/textures/logistica_item_supplier_side.png b/textures/logistica_item_supplier_side.png
deleted file mode 100644
index 2a8a05b..0000000
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diff --git a/textures/logistica_passive_supplier_bottom.png b/textures/logistica_passive_supplier_bottom.png
new file mode 100644
index 0000000..4b07b22
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diff --git a/textures/logistica_passive_supplier_front.png b/textures/logistica_passive_supplier_front.png
new file mode 100644
index 0000000..20d9974
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diff --git a/textures/logistica_passive_supplier_side.png b/textures/logistica_passive_supplier_side.png
new file mode 100644
index 0000000..13e470d
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diff --git a/textures/logistica_passive_supplier_top.png b/textures/logistica_passive_supplier_top.png
new file mode 100644
index 0000000..e49d650
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diff --git a/util/common.lua b/util/common.lua
index 7c5845d..2b41c99 100644
--- a/util/common.lua
+++ b/util/common.lua
@@ -99,11 +99,13 @@ function logistica.toggle_machine_on_off(pos)
 	return nil
 end
 
--- isOn is optional
--- extraText is optional
-function logistica.set_node_tooltip_from_state(pos, extraText)
+-- `isOn` is optional
+-- `extraText` is optional
+-- `overrideState` is optional
+function logistica.set_node_tooltip_from_state(pos, extraText, overrideState)
 	if extraText == nil then extraText = "" else extraText = "\n"..extraText end
-	local isOn = logistica.is_machine_on(pos)
+	local isOn = overrideState
+	if isOn == nil then isOn = logistica.is_machine_on(pos) end
 	logistica.load_position(pos)
   local meta = minetest.get_meta(pos)
   local node = minetest.get_node(pos)
@@ -178,4 +180,8 @@ function logistica.on_timer_powered(func)
 	return function(pos, elapsed)
 		if logistica.is_machine_on(pos) then func(pos, elapsed) end
 	end
+end
+
+function logistica.table_is_empty(table)
+	return table == nil or (next(table) == nil)
 end
\ No newline at end of file
diff --git a/util/util.lua b/util/util.lua
index fc2cf04..e267ea4 100644
--- a/util/util.lua
+++ b/util/util.lua
@@ -10,7 +10,7 @@ dofile(path.."/sound.lua")
 -- bad debug
 d = {}
 d.ttos = logistica.ttos
-d.print = minetest.chat_send_all
+d.log = minetest.chat_send_all
 function table.map(self, f)
     local t = {}
     for k,v in pairs(self) do