diff --git a/basis/fly_lib.lua b/basis/fly_lib.lua
index a9064b7..4ae48b2 100644
--- a/basis/fly_lib.lua
+++ b/basis/fly_lib.lua
@@ -242,9 +242,8 @@ local function attach_objects(pos, offs, parent, yoffs)
 		local dir = vector.subtract(obj:get_pos(), pos)
 		local entity = obj:get_luaentity()
 		if entity then
-			if entity.name == "__builtin:item" then  -- dropped items
-				--obj:set_attach(objref, "", {x=0, y=0, z=0}, {x=0, y=0, z=0}, true) -- hier kracht es
-			elseif entity.name ~= "techage:move_item" then
+			local mod = entity.name:gmatch("(.-):")()
+			if techage.RegisteredMobsMods[mod] then
 				dir.y = dir.y + yoffs
 				attach_single_object(parent, obj, dir)
 			end
diff --git a/basis/lib.lua b/basis/lib.lua
index edbe7c1..d605784 100644
--- a/basis/lib.lua
+++ b/basis/lib.lua
@@ -505,6 +505,14 @@ function techage.wrench_tooltip(x, y)
 		"tooltip["..x..","..y..";0.5,0.5;"..tooltip..";#0C3D32;#FFFFFF]"
 end
 
+techage.RegisteredMobsMods = {}
+
+-- Register mobs mods for the move/fly controllers
+function techage.register_mobs_mods(mod)
+	techage.RegisteredMobsMods[mod] = true
+end
+
+
 -------------------------------------------------------------------------------
 -- Terminal history buffer
 -------------------------------------------------------------------------------
diff --git a/move_controller/flycontroller.lua b/move_controller/flycontroller.lua
index 2db7300..3a9683e 100644
--- a/move_controller/flycontroller.lua
+++ b/move_controller/flycontroller.lua
@@ -96,7 +96,7 @@ minetest.register_node("techage:ta5_flycontroller", {
 			nvm.lpos1 = {}
 			nvm.lpos2 = {}
 			nvm.moveBA = false
-			nvm.running = true
+			nvm.running = nil
 			meta:set_string("status", S("Recording..."))
 			local name = player:get_player_name()
 			minetest.chat_send_player(name, S("Click on all blocks that shall be moved"))
@@ -109,7 +109,7 @@ minetest.register_node("techage:ta5_flycontroller", {
 			if not err then
 				meta:set_string("path", fields.path)
 			end
-			nvm.running = false
+			nvm.running = nil
 			local text = #pos_list.." "..S("block positions are stored.")
 			meta:set_string("status", text)
 			nvm.lpos1 = pos_list
@@ -128,7 +128,7 @@ minetest.register_node("techage:ta5_flycontroller", {
 			local name = player:get_player_name()
 			mark.stop(name)
 			nvm.moveBA = false
-			nvm.running = true
+			nvm.running = nil
 		elseif fields.test then
 			local path, err = fly.to_path(fields.path, MAX_DIST)
 			if err then
diff --git a/move_controller/movecontroller.lua b/move_controller/movecontroller.lua
index 92e2348..ab000ec 100644
--- a/move_controller/movecontroller.lua
+++ b/move_controller/movecontroller.lua
@@ -112,7 +112,7 @@ minetest.register_node("techage:ta4_movecontroller", {
 			nvm.lpos1 = {}
 			nvm.lpos2 = {}
 			nvm.moveBA = false
-			nvm.running = true
+			nvm.running = nil
 			meta:set_string("status", S("Recording..."))
 			local name = player:get_player_name()
 			minetest.chat_send_player(name, S("Click on all blocks that shall be moved"))
@@ -125,7 +125,7 @@ minetest.register_node("techage:ta4_movecontroller", {
 				meta:set_string("path", fields.path)
 			end
 			local text = #pos_list.." "..S("block positions are stored.")
-			nvm.running = false
+			nvm.running = nil
 			meta:set_string("status", text)
 			nvm.lpos1 = pos_list
 			mark.unmark_all(name)
@@ -142,7 +142,7 @@ minetest.register_node("techage:ta4_movecontroller", {
 			local name = player:get_player_name()
 			mark.stop(name)
 			nvm.moveBA = false
-			nvm.running = true
+			nvm.running = nil
 		elseif fields.moveAB then
 			meta:set_string("status", "")
 			if fly.move_to_other_pos(pos, false) then