diff --git a/test3d_t410/init.lua b/test3d_t410/init.lua
index e15d77d..7d6f874 100644
--- a/test3d_t410/init.lua
+++ b/test3d_t410/init.lua
@@ -1,4 +1,3 @@
-local MEMSIZE=16
 if not digiline then
  print("Digilines not found.")
  return
@@ -12,16 +11,7 @@ end
 print("Loading.")
 
 local function t410_set_meta(pos)
- local meta = minetest.get_meta(pos)
- local ms = ""
- for i = 1, MEMSIZE do
-  ms = ms .. "0\n"
- end
- meta:set_string("mem",ms)
- meta:set_string("channel","Default")
- meta:set_int("startaddr",0)
- meta:set_string("formspec","size[2,4]\nfield[0,1;2.9,1;addr;Address;]\nfield[0,2;2.9,1;data;Data;]\nbutton[0,3;2,1;write;Write]")
---
+ minetest.get_meta(pos):set_string("formspec","size[2,4]\nfield[0,1;2.9,1;addr;Address;]\nfield[0,2;2.9,1;data;Data;]\nbutton[0,3;2,1;write;Write]")
 end
 minetest.register_node("test3d_t410:t410", {
  description = "T410 Memory Access Console",
@@ -30,7 +20,7 @@ minetest.register_node("test3d_t410:t410", {
  groups = {snappy=1,choppy=2,oddly_breakable_by_hand=2,flammable=3},
  on_receive_fields = function(pos,_,fields,sender)
   if fields.addr == nil then return end
-  digiline:receptor_send(pos, digiline.rules.default, fields.addr, tonumber(fields.data or 0))
+  digiline:receptor_send(pos, digiline.rules.default, fields.addr, tonumber(fields.data) or 0)
   print("Set "..fields.addr.." to "..fields.data)
  end,
  digiline = {
diff --git a/test3d_t416/init.lua b/test3d_t416/init.lua
index b84d9f7..601e51a 100644
--- a/test3d_t416/init.lua
+++ b/test3d_t416/init.lua
@@ -54,7 +54,7 @@ minetest.register_node("test3d_t416:t416", {
  digiline = {
   receptor = {},
   effector = {
-   action = t416_digiline_receive
+   action = function (a,b,c,d) pcall(t416_digiline_receive,a,b,c,d) end
   }
  },
  on_receive_fields = function(pos,_,fields,sender)