local i = next(0,100)
x_formspec =
"invsize[8,9;]"..
"label[1,3;Variable_from_node]"
minetest.register_node("X:x", {
local Variable_from_node = 10
})
Could you change the tube recipe to
XGX
XGX
XGX
So there are not any recipe messups with other mods