diff --git a/.luacheckrc b/.luacheckrc
index 350fb8c..4891133 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -1,10 +1,8 @@
 unused_args = false
-allow_defined_top = true
 max_line_length = 999
 
 globals = {
-    "technic", "minetest",
-    "srcstack",
+    "technic", "technic_cnc", "minetest", "wrench"
 }
 
 read_globals = {
diff --git a/extranodes/init.lua b/extranodes/init.lua
index 42c7d67..55b4e8b 100644
--- a/extranodes/init.lua
+++ b/extranodes/init.lua
@@ -57,7 +57,7 @@ if minetest.get_modpath("moreblocks") then
 		tiles={"technic_stainless_steel_block.png"},
 	})
 
-	function register_technic_stairs_alias(modname, origname, newmod, newname)
+	local function register_technic_stairs_alias(modname, origname, newmod, newname)
 		minetest.register_alias(modname .. ":slab_" .. origname, newmod..":slab_" .. newname)
 		minetest.register_alias(modname .. ":slab_" .. origname .. "_inverted", newmod..":slab_" .. newname .. "_inverted")
 		minetest.register_alias(modname .. ":slab_" .. origname .. "_wall", newmod..":slab_" .. newname .. "_wall")
diff --git a/technic/machines/MV/lighting.lua b/technic/machines/MV/lighting.lua
index f7c9124..9a8d369 100644
--- a/technic/machines/MV/lighting.lua
+++ b/technic/machines/MV/lighting.lua
@@ -12,7 +12,7 @@ else
 	S = function (s) return s end
 end
 
-function technic_homedecor_node_is_owned(pos, placer)
+local function technic_homedecor_node_is_owned(pos, placer)
         local ownername = false
         if type(isprotect) == "function" then -- glomie's protection mod
                 if not isprotect(5, pos, placer) then
diff --git a/technic_cnc/cnc.lua b/technic_cnc/cnc.lua
index cb81bd4..eb158aa 100644
--- a/technic_cnc/cnc.lua
+++ b/technic_cnc/cnc.lua
@@ -236,7 +236,7 @@ local run = function(pos, node)
 		meta:set_int("src_time", meta:get_int("src_time") + 1)
 		if meta:get_int("src_time") >= 3 then -- 3 ticks per output
 			meta:set_int("src_time", 0)
-			srcstack = inv:get_stack("src", 1)
+			local srcstack = inv:get_stack("src", 1)
 			srcstack:take_item()
 			inv:set_stack("src", 1, srcstack)
 			inv:add_item("dst", result.." "..meta:get_int("cnc_multiplier"))