diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5791805
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+# Digimons - Digilines Monitors
+Digilines monitors mod for Minetest using Display API / Font API.
+
+**Version**: Alpha
+
+**Dependancies**: display_api, font_api, digilines
+
+**License**: LGPL v3 for the code, CC-BY-SA for the textures.
diff --git a/nodes.lua b/nodes.lua
index 059a67c..f3e2cc6 100644
--- a/nodes.lua
+++ b/nodes.lua
@@ -1,86 +1,105 @@
 --[[
-    digimons mod for Minetest - Digiline monitors using Display API / Font API
-    (c) Pierre-Yves Rollo
+	digimons mod for Minetest - Digilines monitors using Display API / Font API
+	(c) Pierre-Yves Rollo
 
-    This file is part of digimons.
+	This file is part of digimons.
 
-    signs is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
+	signs is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
 
-    signs is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
+	signs is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
 
-    You should have received a copy of the GNU General Public License
-    along with signs.  If not, see <http://www.gnu.org/licenses/>.
+	You should have received a copy of the GNU General Public License
+	along with signs.  If not, see <http://www.gnu.org/licenses/>.
 --]]
 
-minetest.register_node('digimons:cathodic_amber_monitor', {
-  description = "Cathodic amber monitor",
-  sunlight_propagates = false,
-  paramtype = "light",
-  paramtype2 = "facedir",
-  tiles = { "digimons_amber_top.png", "digimons_amber_bottom.png",
-            "digimons_amber_sides.png", "digimons_amber_sides.png^[transformFX]",
-            "digimons_amber_back.png", "digimons_amber_front.png",},
-  drawtype = "nodebox",
-  groups = {choppy = 1, oddly_breakable_by_hand = 1, display_modpack_node = 1},
-  node_box = {
-    type = "fixed",
-    fixed = {
-      {-8/16, 8/16, -8/16, 8/16, 7/16, -7/16},
-      {-8/16, -8/16, -8/16, 8/16, -5/16, -7/16},
-      {-8/16, 7/16, -8/16, -7/16, -5/16, -7/16},
-      {7/16, 7/16, -8/16, 8/16, -5/16, -7/16},
-      {-8/16, -8/16, -7/16, 8/16, 8/16, 1/16},
-      {-6/16, 5/16, 1/16, 6/16, -8/16, 8/16}
-    },
-  },
-  display_entities = {
-    ["digimons:screen"] = {
-        on_display_update = font_api.on_display_update,
-        depth = -7/16 - display_api.entity_spacing,
-        top = -1/16,
-        aspect_ratio = 0.5, maxlines = 6,
-        size = { x = 23/32, y = 10/16 },
-        color = "#FFA000", font_name = "mozart", halign="left", valing="top",
-    },
-  },
-  on_place = function(itemstack, placer, pointed_thing)
-      minetest.rotate_node(itemstack, placer, pointed_thing)
-      return display_api.on_place(itemstack, placer, pointed_thing)
-    end,
-  on_construct = function(pos)
-      minetest.get_meta(pos):set_string("formspec",
-        "field[channel;Channel;${channel}]")
-      display_api.on_construct(pos)
-    end,
-  on_destruct = display_api.on_destruct,
-  on_rotate = display_api.on_rotate,
-  on_receive_fields = function(pos, formname, fields, player)
-  		local name = player:get_player_name()
-      if minetest.is_protected(pos, name) then
-        minetest.record_protection_violation(pos, name)
-      	return
-    	end
+local common_node_def = {
+	groups = { display_api = 1},
+	on_place = function(itemstack, placer, pointed_thing)
+			minetest.rotate_node(itemstack, placer, pointed_thing)
+			return display_api.on_place(itemstack, placer, pointed_thing)
+		end,
+	on_destruct = display_api.on_destruct,
+	on_rotate = display_api.on_rotate,
+	on_punch = display_api.update_entities,
+	on_construct = function(pos)
+			minetest.get_meta(pos):set_string("formspec",
+				"field[channel;Channel;${channel}]")
+			display_api.on_construct(pos)
+		end,
+	on_receive_fields = function(pos, formname, fields, player)
+			local name = player:get_player_name()
+			if minetest.is_protected(pos, name) then
+				minetest.record_protection_violation(pos, name)
+				return
+			end
 
-    	if (fields.channel) then
-    		minetest.get_meta(pos):set_string("channel", fields.channel)
-    	end
-    end,
-  on_punch = display_api.update_entities,
-  digiline = {
-    receptor = {},
-    effector = {
-      action = function(pos, _, channel, msg)
-          if channel ~= minetest.get_meta(pos):get_string("channel") then
-            return
-          end
-          digimons.push_text_on_screen(pos, msg)
-        end,
-  	},
-  },
+			if (fields.channel) then
+				minetest.get_meta(pos):set_string("channel", fields.channel)
+			end
+		end,
+	digiline = {
+		receptor = {},
+		effector = {
+			action = function(pos, _, channel, msg)
+					if channel ~= minetest.get_meta(pos):get_string("channel") then
+						return
+					end
+					digimons.push_text_on_screen(pos, msg)
+				end,
+		},
+	},
+}
+
+function digimons.register_monitor(nodename, nodedef)
+	def = table.copy(common_node_def)
+	for key, value in pairs(nodedef) do
+		if key == 'groups' then
+			def[key] = def[key] or {}
+			for key2, value2 in pairs(value) do
+				def[key][key2] = value2
+			end
+		else
+			def[key] = value
+		end
+	end
+	minetest.register_node(nodename, nodedef)
+end
+
+digimons.register_monitor('digimons:cathodic_amber_monitor', {
+	description = "Cathodic amber monitor",
+	sunlight_propagates = false,
+	paramtype = "light",
+	paramtype2 = "facedir",
+	tiles = { "digimons_amber_top.png", "digimons_amber_bottom.png",
+						"digimons_amber_sides.png", "digimons_amber_sides.png^[transformFX]",
+						"digimons_amber_back.png", "digimons_amber_front.png",},
+	drawtype = "nodebox",
+	groups = {choppy = 1, oddly_breakable_by_hand = 1},
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{-8/16, 8/16, -8/16, 8/16, 7/16, -7/16},
+			{-8/16, -8/16, -8/16, 8/16, -5/16, -7/16},
+			{-8/16, 7/16, -8/16, -7/16, -5/16, -7/16},
+			{7/16, 7/16, -8/16, 8/16, -5/16, -7/16},
+			{-8/16, -8/16, -7/16, 8/16, 8/16, 1/16},
+			{-6/16, 5/16, 1/16, 6/16, -8/16, 8/16}
+		},
+	},
+	display_entities = {
+		["digimons:screen"] = {
+				on_display_update = font_api.on_display_update,
+				depth = -7/16 - display_api.entity_spacing,
+				top = -1/16,
+				aspect_ratio = 0.5, maxlines = 6,
+				size = { x = 23/32, y = 10/16 },
+				color = "#FFA000", font_name = "mozart", halign="left", valing="top",
+		},
+	},
 })