diff --git a/mods/pipeworks/autocrafter.lua b/mods/pipeworks/autocrafter.lua
index def9603..faf5381 100755
--- a/mods/pipeworks/autocrafter.lua
+++ b/mods/pipeworks/autocrafter.lua
@@ -183,7 +183,14 @@ local function update_meta(meta, enabled)
 			default.gui_bg_img..
 			default.gui_slots..
 			default.get_hotbar_bg(0,7) ..
-			"list[current_player;main;0,7;8,4;]")
+			"list[current_player;main;0,7;8,4;]" ..
+			"listring[current_player;main]"..
+			"listring[context;src]" ..
+			"listring[context;dst]" ..
+			"listring[current_player;main]"..
+			"listring[context;recipe]" ..
+			"listring[context;output]"
+			)
 
 	-- toggling the button doesn't quite call for running a recipe change check
 	-- so instead we run a minimal version for infotext setting only
@@ -223,7 +230,7 @@ local function upgrade_autocrafter(pos, meta)
 			if not recipe then return end
 			for idx, stack in ipairs(recipe) do
 				if not stack:is_empty() then
-					minetest.item_drop(stack, "", pos)
+					minetest.add_item(pos, stack)
 					stack:set_count(1)
 					stack:set_wear(0)
 					inv:set_stack("recipe", idx, stack)
diff --git a/mods/pipeworks/compat.lua b/mods/pipeworks/compat.lua
index c89e492..9c956e6 100755
--- a/mods/pipeworks/compat.lua
+++ b/mods/pipeworks/compat.lua
@@ -15,6 +15,10 @@ minetest.override_item("default:furnace", {
 		insert_object = function(pos, node, stack, direction)
 			local meta = minetest.get_meta(pos)
 			local inv = meta:get_inventory()
+			local timer = minetest.get_node_timer(pos)
+			if not timer:is_started() then
+				timer:start(1.0)
+			end
 			if direction.y == 1 then
 				return inv:add_item("fuel",stack)
 			else
@@ -60,6 +64,10 @@ minetest.override_item("default:furnace_active", {
 		insert_object = function(pos,node,stack,direction)
 			local meta = minetest.get_meta(pos)
 			local inv = meta:get_inventory()
+			local timer = minetest.get_node_timer(pos)
+			if not timer:is_started() then
+				timer:start(1.0)
+			end
 			if direction.y == 1 then
 				return inv:add_item("fuel", stack)
 			else
diff --git a/mods/pipeworks/default_settings.txt b/mods/pipeworks/default_settings.txt
index bbf02ce..41a3f7a 100755
--- a/mods/pipeworks/default_settings.txt
+++ b/mods/pipeworks/default_settings.txt
@@ -10,6 +10,7 @@ pipeworks.enable_pipe_devices = true
 pipeworks.enable_redefines = true
 pipeworks.enable_mese_tube = true
 pipeworks.enable_detector_tube = true
+pipeworks.enable_digiline_detector_tube = true
 pipeworks.enable_conductor_tube = true
 pipeworks.enable_accelerator_tube = true
 pipeworks.enable_crossing_tube = true
@@ -19,4 +20,4 @@ pipeworks.enable_one_way_tube = true
 pipeworks.enable_priority_tube = true
 pipeworks.enable_cyclic_mode = true
 
-pipeworks.delete_item_on_clearobject = true
\ No newline at end of file
+pipeworks.delete_item_on_clearobject = true
diff --git a/mods/pipeworks/depends.txt b/mods/pipeworks/depends.txt
index 02a542c..dff9dfb 100755
--- a/mods/pipeworks/depends.txt
+++ b/mods/pipeworks/depends.txt
@@ -1,3 +1,4 @@
 default
 mesecons?
 mesecons_mvps?
+digilines?
diff --git a/mods/pipeworks/description.txt b/mods/pipeworks/description.txt
new file mode 100644
index 0000000..9e6e800
--- /dev/null
+++ b/mods/pipeworks/description.txt
@@ -0,0 +1 @@
+This mod uses nodeboxes to supply a complete set of 3D pipes and tubes, along devices that work with them.
diff --git a/mods/pipeworks/devices.lua b/mods/pipeworks/devices.lua
index c96ad97..f7f6f45 100755
--- a/mods/pipeworks/devices.lua
+++ b/mods/pipeworks/devices.lua
@@ -3,7 +3,7 @@
 local pipereceptor_on = nil
 local pipereceptor_off = nil
 
-if mesecon then
+if minetest.get_modpath("mesecons") then
 	pipereceptor_on = {
 		receptor = {
 			state = mesecon.state.on,
@@ -35,6 +35,8 @@ local pipes_devicelist = {
 	"storage_tank_10"
 }
 
+local rules = pipeworks.mesecons_rules -- Enough with the undefined global variable // MFF (Mg|01/07/2016 for #68)
+
 -- Now define the nodes.
 
 local states = { "on", "off" }
diff --git a/mods/pipeworks/filter-injector.lua b/mods/pipeworks/filter-injector.lua
index bcfcbc9..7fbabc2 100755
--- a/mods/pipeworks/filter-injector.lua
+++ b/mods/pipeworks/filter-injector.lua
@@ -12,7 +12,30 @@ end
 
 local function set_filter_formspec(data, meta)
 	local itemname = data.wise_desc.." Filter-Injector"
-	local formspec = "size[8,8.5]"..
+
+	local formspec
+	if data.digiline then
+		formspec = "size[8,2.7]"..
+			"item_image[0,0;1,1;pipeworks:"..data.name.."]"..
+			"label[1,0;"..minetest.formspec_escape(itemname).."]"..
+			"field[0.3,1.5;8.0,1;channel;Channel;${channel}]"..
+			fs_helpers.cycling_button(meta, "button[0,2;4,1", "slotseq_mode",
+				{"Sequence slots by Priority",
+				 "Sequence slots Randomly",
+				 "Sequence slots by Rotation"})..
+			fs_helpers.cycling_button(meta, "button[4,2;4,1", "exmatch_mode",
+				{"Exact match - off",
+				 "Exact match - on "})
+	else
+		local exmatch_button = ""
+		if data.stackwise then
+			exmatch_button =
+				fs_helpers.cycling_button(meta, "button[4,3.5;4,1", "exmatch_mode",
+					{"Exact match - off",
+					 "Exact match - on "})
+		end
+
+		formspec = "size[8,8.5]"..
 			"item_image[0,0;1,1;pipeworks:"..data.name.."]"..
 			"label[1,0;"..minetest.formspec_escape(itemname).."]"..
 			"label[0,1;Prefer item types:]"..
@@ -21,12 +44,15 @@ local function set_filter_formspec(data, meta)
 				{"Sequence slots by Priority",
 				 "Sequence slots Randomly",
 				 "Sequence slots by Rotation"})..
-			"list[current_player;main;0,4.5;8,4;]"
+			exmatch_button..
+			"list[current_player;main;0,4.5;8,4;]" ..
+			"listring[]"
+	end
 	meta:set_string("formspec", formspec)
 end
 
 -- todo SOON: this function has *way too many* parameters
-local function grabAndFire(data,slotseq_mode,filtmeta,frominv,frominvname,frompos,fromnode,filterfor,fromtube,fromdef,dir,fakePlayer,all)
+local function grabAndFire(data,slotseq_mode,exmatch_mode,filtmeta,frominv,frominvname,frompos,fromnode,filterfor,fromtube,fromdef,dir,fakePlayer,all)
 	local sposes = {}
 	for spos,stack in ipairs(frominv:get_list(frominvname)) do
 		local matches
@@ -79,7 +105,11 @@ local function grabAndFire(data,slotseq_mode,filtmeta,frominv,frominvname,frompo
 				if all then
 					count = math.min(stack:get_count(), doRemove)
 					if filterfor.count and filterfor.count > 1 then
-						count = math.min(filterfor.count, count)
+						if exmatch_mode ~= 0 and filterfor.count > count then
+							return false
+						else
+							count = math.min(filterfor.count, count)
+						end
 					end
 				else
 					count = 1
@@ -103,7 +133,7 @@ local function grabAndFire(data,slotseq_mode,filtmeta,frominv,frominvname,frompo
 	return false
 end
 
-local function punch_filter(data, filtpos, filtnode)
+local function punch_filter(data, filtpos, filtnode, msg)
 	local filtmeta = minetest.get_meta(filtpos)
 	local filtinv = filtmeta:get_inventory()
 	local owner = filtmeta:get_string("owner")
@@ -119,21 +149,110 @@ local function punch_filter(data, filtpos, filtnode)
 	if not fromdef then return end
 	local fromtube = fromdef.tube
 	if not (fromtube and fromtube.input_inventory) then return end
+
+	local slotseq_mode
+	local exact_match
+
 	local filters = {}
-	for _, filterstack in ipairs(filtinv:get_list("main")) do
-		local filtername = filterstack:get_name()
-		local filtercount = filterstack:get_count()
-		if filtername ~= "" then table.insert(filters, {name = filtername, count = filtercount}) end
+	if data.digiline then
+		local t_msg = type(msg)
+		if t_msg == "table" then
+			local slotseq = msg.slotseq
+			local t_slotseq = type(slotseq)
+			if t_slotseq == "number" and slotseq >= 0 and slotseq <= 2 then
+				slotseq_mode = slotseq
+			elseif t_slotseq == "string" then
+				slotseq = string.lower(slotseq)
+				if slotseq == "priority" then
+					slotseq_mode = 0
+				elseif slotseq == "random" then
+					slotseq_mode = 1
+				elseif slotseq == "rotation" then
+					slotseq_mode = 2
+				end
+			end
+
+			local exmatch = msg.exmatch
+			local t_exmatch = type(exmatch)
+			if t_exmatch == "number" and exmatch >= 0 and exmatch <= 1 then
+				exact_match = exmatch
+			elseif t_exmatch == "boolean" then
+				exact_match = exmatch and 1 or 0
+			end
+
+			local slotseq_index = msg.slotseq_index
+			if type(slotseq_index) == "number" then
+				-- This should allow any valid index, but I'm not completely sure what
+				-- constitutes a valid index, so I'm only allowing resetting it to 1.
+				if slotseq_index == 1 then
+					filtmeta:set_int("slotseq_index", slotseq_index)
+					set_filter_infotext(data, filtmeta)
+				end
+			end
+
+			if slotseq_mode ~= nil then
+				filtmeta:set_int("slotseq_mode", slotseq_mode)
+			end
+
+			if exact_match ~= nil then
+				filtmeta:set_int("exmatch_mode", exact_match)
+			end
+
+			if slotseq_mode ~= nil or exact_match ~= nil then
+				set_filter_formspec(data, filtmeta)
+			end
+
+			if msg.nofire then
+				return
+			end
+
+			if type(msg.name) == "string" then
+				table.insert(filters, {name = msg.name, count = tonumber(msg.count) or 1})
+			else
+				for _, filter in ipairs(msg) do
+					local t_filter = type(filter)
+					if t_filter == "table" then
+						if type(filter.name) == "string" then
+							table.insert(filters, {name = filter.name, count = tonumber(filter.count) or 1})
+						end
+					elseif t_filter == "string" then
+						local filterstack = ItemStack(filter)
+						local filtername = filterstack:get_name()
+						local filtercount = filterstack:get_count()
+						if filtername ~= "" then table.insert(filters, {name = filtername, count = filtercount}) end
+					end
+				end
+			end
+		elseif t_msg == "string" then
+			local filterstack = ItemStack(msg)
+			local filtername = filterstack:get_name()
+			local filtercount = filterstack:get_count()
+			if filtername ~= "" then table.insert(filters, {name = filtername, count = filtercount}) end
+		end
+	else
+		for _, filterstack in ipairs(filtinv:get_list("main")) do
+			local filtername = filterstack:get_name()
+			local filtercount = filterstack:get_count()
+			if filtername ~= "" then table.insert(filters, {name = filtername, count = filtercount}) end
+		end
 	end
 	if #filters == 0 then table.insert(filters, "") end
-	local slotseq_mode = filtmeta:get_int("slotseq_mode")
+
+	if slotseq_mode == nil then
+		slotseq_mode = filtmeta:get_int("slotseq_mode")
+	end
+
+	if exact_match == nil then
+		exact_match = filtmeta:get_int("exmatch_mode")
+	end
+
 	local frommeta = minetest.get_meta(frompos)
 	local frominv = frommeta:get_inventory()
 	if fromtube.before_filter then fromtube.before_filter(frompos) end
 	for _, frominvname in ipairs(type(fromtube.input_inventory) == "table" and fromtube.input_inventory or {fromtube.input_inventory}) do
 		local done = false
 		for _, filterfor in ipairs(filters) do
-			if grabAndFire(data, slotseq_mode, filtmeta, frominv, frominvname, frompos, fromnode, filterfor, fromtube, fromdef, dir, fakePlayer, data.stackwise) then
+			if grabAndFire(data, slotseq_mode, exact_match, filtmeta, frominv, frominvname, frompos, fromnode, filterfor, fromtube, fromdef, dir, fakePlayer, data.stackwise) then
 				done = true
 				break
 			end
@@ -154,8 +273,14 @@ for _, data in ipairs({
 		wise_desc = "Stackwise",
 		stackwise = true,
 	},
+	{ -- register even if no digilines
+		name = "digiline_filter",
+		wise_desc = "Digiline",
+		stackwise = true,
+		digiline = true,
+	},
 }) do
-	minetest.register_node("pipeworks:"..data.name, {
+	local node = {
 		description = data.wise_desc.." Filter-Injector",
 		tiles = {
 			"pipeworks_"..data.name.."_top.png",
@@ -181,14 +306,6 @@ for _, data in ipairs({
 			pipeworks.after_place(pos)
 		end,
 		after_dig_node = pipeworks.after_dig,
-		on_receive_fields = function(pos, formname, fields, sender)
-			if not pipeworks.may_configure(pos, sender) then return end
-			fs_helpers.on_receive_fields(pos, fields)
-			local meta = minetest.get_meta(pos)
-			meta:set_int("slotseq_index", 1)
-			set_filter_formspec(data, meta)
-			set_filter_infotext(data, meta)
-		end,
 		allow_metadata_inventory_put = function(pos, listname, index, stack, player)
 			if not pipeworks.may_configure(pos, player) then return 0 end
 			return stack:get_count()
@@ -206,18 +323,63 @@ for _, data in ipairs({
 			local inv = meta:get_inventory()
 			return inv:is_empty("main")
 		end,
-		mesecons = {
+		tube = {connect_sides = {right = 1}},
+	}
+
+	if data.digiline then
+		node.groups.mesecon = nil
+		if not minetest.get_modpath("digilines") then
+			node.groups.not_in_creative_inventory = 1
+		end
+
+		node.on_receive_fields = function(pos, formname, fields, sender)
+			if not pipeworks.may_configure(pos, sender) then return end
+			fs_helpers.on_receive_fields(pos, fields)
+
+			if fields.channel then
+				minetest.get_meta(pos):set_string("channel", fields.channel)
+			end
+
+			local meta = minetest.get_meta(pos)
+			--meta:set_int("slotseq_index", 1)
+			set_filter_formspec(data, meta)
+			set_filter_infotext(data, meta)
+		end
+		node.digiline = {
+			effector = {
+				action = function(pos, node, channel, msg)
+					local meta = minetest.get_meta(pos)
+					local setchan = meta:get_string("channel")
+					if setchan ~= channel then return end
+
+					punch_filter(data, pos, node, msg)
+				end,
+			},
+		}
+	else
+		node.on_receive_fields = function(pos, formname, fields, sender)
+			if not pipeworks.may_configure(pos, sender) then return end
+			fs_helpers.on_receive_fields(pos, fields)
+			local meta = minetest.get_meta(pos)
+			meta:set_int("slotseq_index", 1)
+			set_filter_formspec(data, meta)
+			set_filter_infotext(data, meta)
+		end
+		node.mesecons = {
 			effector = {
 				action_on = function(pos, node)
 					punch_filter(data, pos, node)
 				end,
 			},
-		},
-		tube = {connect_sides = {right = 1}},
-		on_punch = function (pos, node, puncher)
+		}
+		node.on_punch = function (pos, node, puncher)
 			punch_filter(data, pos, node)
-		end,
-	})
+		end
+	end
+
+
+
+	minetest.register_node("pipeworks:"..data.name, node)
 end
 
 minetest.register_craft( {
@@ -237,3 +399,14 @@ minetest.register_craft( {
 	        { "default:steel_ingot", "default:steel_ingot", "homedecor:plastic_sheeting" }
 	},
 })
+
+if minetest.get_modpath("digilines") then
+	minetest.register_craft( {
+		output = "pipeworks:digiline_filter 2",
+		recipe = {
+			{ "default:steel_ingot", "default:steel_ingot", "homedecor:plastic_sheeting" },
+			{ "group:stick", "digilines:wire_std_00000000", "homedecor:plastic_sheeting" },
+			{ "default:steel_ingot", "default:steel_ingot", "homedecor:plastic_sheeting" }
+		},
+	})
+end
diff --git a/mods/pipeworks/init.lua b/mods/pipeworks/init.lua
index 5165617..b093812 100755
--- a/mods/pipeworks/init.lua
+++ b/mods/pipeworks/init.lua
@@ -16,9 +16,11 @@ pipeworks.modpath = minetest.get_modpath("pipeworks")
 dofile(pipeworks.modpath.."/default_settings.txt")
 
 -- Read the external config file if it exists.
-if io.open(pipeworks.worldpath.."/pipeworks_settings.txt","r") then
-	dofile(pipeworks.worldpath.."/pipeworks_settings.txt")
-	io.close()
+local worldsettingspath = pipeworks.worldpath.."/pipeworks_settings.txt"
+local worldsettingsfile = io.open(worldsettingspath, "r")
+if worldsettingsfile then
+	worldsettingsfile:close()
+	dofile(worldsettingspath)
 end
 
 -- Random variables
diff --git a/mods/pipeworks/item_transport.lua b/mods/pipeworks/item_transport.lua
index 037cad7..ee17611 100755
--- a/mods/pipeworks/item_transport.lua
+++ b/mods/pipeworks/item_transport.lua
@@ -249,7 +249,10 @@ luaentity.register_entity("pipeworks:tubed_item", {
 			if not found_next then
 				drop_pos = minetest.find_node_near(vector.add(self.start_pos, velocity), 1, "air")
 				if drop_pos then
-					minetest.item_drop(stack, "", drop_pos)
+					-- Using add_item instead of item_drop since this makes pipeworks backward
+					-- compatible with Minetest 0.4.13.
+					-- Using item_drop here makes Minetest 0.4.13 crash.
+					minetest.add_item(drop_pos, stack)
 					self:remove()
 					return
 				end
diff --git a/mods/pipeworks/luaentity.lua b/mods/pipeworks/luaentity.lua
index e13c613..68d1660 100755
--- a/mods/pipeworks/luaentity.lua
+++ b/mods/pipeworks/luaentity.lua
@@ -29,7 +29,7 @@ local function read_entities()
 end
 
 local function write_entities()
-	for _, entity in pairs(luaentity.entities) do
+	for _, entity in pairs(luaentity.entities or {}) do
 		setmetatable(entity, nil)
 		for _, attached in pairs(entity._attached_entities) do
 			if attached.entity then
@@ -53,31 +53,29 @@ end
 
 local active_blocks = {} -- These only contain active blocks near players (i.e., not forceloaded ones)
 local handle_active_blocks_step = 2
-local handle_active_blocks_timer = 0
-minetest.register_globalstep(function(dtime)
-	handle_active_blocks_timer = handle_active_blocks_timer + dtime
-	if handle_active_blocks_timer >= handle_active_blocks_step then
-		handle_active_blocks_timer = handle_active_blocks_timer - handle_active_blocks_step
-		local active_block_range = tonumber(minetest.setting_get("active_block_range")) or 2
-		local new_active_blocks = {}
-		for _, player in ipairs(minetest.get_connected_players()) do
-			local blockpos = get_blockpos(player:getpos())
-			local minp = vector.subtract(blockpos, active_block_range)
-			local maxp = vector.add(blockpos, active_block_range)
+local function active_blocks_step()
+	local active_block_range = tonumber(minetest.setting_get("active_block_range")) or 2
+	local new_active_blocks = {}
+	for _, player in ipairs(minetest.get_connected_players()) do
+		local blockpos = get_blockpos(player:getpos())
+		local minp = vector.subtract(blockpos, active_block_range)
+		local maxp = vector.add(blockpos, active_block_range)
 
-			for x = minp.x, maxp.x do
-			for y = minp.y, maxp.y do
-			for z = minp.z, maxp.z do
-				local pos = {x = x, y = y, z = z}
-				new_active_blocks[minetest.hash_node_position(pos)] = pos
-			end
-			end
-			end
+		for x = minp.x, maxp.x do
+		for y = minp.y, maxp.y do
+		for z = minp.z, maxp.z do
+			local pos = {x = x, y = y, z = z}
+			new_active_blocks[minetest.hash_node_position(pos)] = pos
+		end
+		end
 		end
-		active_blocks = new_active_blocks
-		-- todo: callbacks on block load/unload
 	end
-end)
+	active_blocks = new_active_blocks
+	-- todo: callbacks on block load/unload
+
+	minetest.after(handle_active_blocks_step, active_blocks_step)
+end
+minetest.after(0, active_blocks_step)
 
 local function is_active(pos)
 	return active_blocks[minetest.hash_node_position(get_blockpos(pos))] ~= nil
diff --git a/mods/pipeworks/mod.conf b/mods/pipeworks/mod.conf
new file mode 100644
index 0000000..d9d2984
--- /dev/null
+++ b/mods/pipeworks/mod.conf
@@ -0,0 +1 @@
+name = pipeworks
diff --git a/mods/pipeworks/textures/pipeworks_digiline_detector_tube_end.png b/mods/pipeworks/textures/pipeworks_digiline_detector_tube_end.png
new file mode 100644
index 0000000..e9d01ba
Binary files /dev/null and b/mods/pipeworks/textures/pipeworks_digiline_detector_tube_end.png differ
diff --git a/mods/pipeworks/textures/pipeworks_digiline_detector_tube_inv.png b/mods/pipeworks/textures/pipeworks_digiline_detector_tube_inv.png
new file mode 100644
index 0000000..0ed763a
Binary files /dev/null and b/mods/pipeworks/textures/pipeworks_digiline_detector_tube_inv.png differ
diff --git a/mods/pipeworks/textures/pipeworks_digiline_detector_tube_noctr.png b/mods/pipeworks/textures/pipeworks_digiline_detector_tube_noctr.png
new file mode 100644
index 0000000..6f07886
Binary files /dev/null and b/mods/pipeworks/textures/pipeworks_digiline_detector_tube_noctr.png differ
diff --git a/mods/pipeworks/textures/pipeworks_digiline_detector_tube_plain.png b/mods/pipeworks/textures/pipeworks_digiline_detector_tube_plain.png
new file mode 100644
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