diff --git a/.luacheckrc b/.luacheckrc
new file mode 100644
index 0000000..55879b0
--- /dev/null
+++ b/.luacheckrc
@@ -0,0 +1,30 @@
+std = "lua51+minetest"
+unused_args = false
+allow_defined_top = true
+max_line_length = 999
+
+stds.minetest = {
+	read_globals = {
+		"DIR_DELIM",
+		"minetest",
+		"core",
+		"dump",
+		"vector",
+		"nodeupdate",
+		"VoxelManip",
+		"VoxelArea",
+		"PseudoRandom",
+		"ItemStack",
+		"default",
+		table = {
+			fields = {
+				"copy",
+			},
+		},
+	}
+}
+
+read_globals = {
+	"default",
+	"moreores",
+}
diff --git a/init.lua b/init.lua
index 32873a1..348c059 100644
--- a/init.lua
+++ b/init.lua
@@ -7,6 +7,7 @@
 local modpath = minetest.get_modpath("basic_materials")
 
 basic_materials = {}
+basic_materials.mod = { author = "Vanessa Dannenberg" }
 
 dofile(modpath.."/metals.lua")
 dofile(modpath.."/plastics.lua")
diff --git a/metals.lua b/metals.lua
index 37685f8..0a3243b 100644
--- a/metals.lua
+++ b/metals.lua
@@ -5,31 +5,37 @@ local S = minetest.get_translator("basic_materials")
 
 minetest.register_craftitem("basic_materials:steel_wire", {
 	description = S("Spool of steel wire"),
+	groups = { wire = 1 },
 	inventory_image = "basic_materials_steel_wire.png"
 })
 
 minetest.register_craftitem("basic_materials:copper_wire", {
 	description = S("Spool of copper wire"),
+	groups = { wire = 1 },
 	inventory_image = "basic_materials_copper_wire.png"
 })
 
 minetest.register_craftitem("basic_materials:silver_wire", {
 	description = S("Spool of silver wire"),
+	groups = { wire = 1 },
 	inventory_image = "basic_materials_silver_wire.png"
 })
 
 minetest.register_craftitem("basic_materials:gold_wire", {
 	description = S("Spool of gold wire"),
+	groups = { wire = 1 },
 	inventory_image = "basic_materials_gold_wire.png"
 })
 
 minetest.register_craftitem("basic_materials:steel_strip", {
 	description = S("Steel Strip"),
+	groups = { strip = 1 },
 	inventory_image = "basic_materials_steel_strip.png"
 })
 
 minetest.register_craftitem("basic_materials:copper_strip", {
 	description = S("Copper Strip"),
+	groups = { strip = 1 },
 	inventory_image = "basic_materials_copper_strip.png"
 })
 
@@ -40,11 +46,13 @@ minetest.register_craftitem("basic_materials:steel_bar", {
 
 minetest.register_craftitem("basic_materials:chainlink_brass", {
 	description = S("Chainlinks (brass)"),
+	groups = { chainlinks = 1 },
 	inventory_image = "basic_materials_chainlink_brass.png"
 })
 
 minetest.register_craftitem("basic_materials:chainlink_steel", {
 	description = S("Chainlinks (steel)"),
+	groups = { chainlinks = 1 },
 	inventory_image = "basic_materials_chainlink_steel.png"
 })
 
@@ -70,14 +78,6 @@ local chains_sbox = {
 	fixed = { -0.1, -0.5, -0.1, 0.1, 0.5, 0.1 }
 }
 
-local topchains_sbox = {
-	type = "fixed",
-	fixed = {
-		{ -0.25, 0.35, -0.25, 0.25, 0.5, 0.25 },
-		{ -0.1, -0.5, -0.1, 0.1, 0.4, 0.1 }
-	}
-}
-
 minetest.register_node("basic_materials:chain_steel", {
 	description = S("Chain (steel, hanging)"),
 	drawtype = "mesh",
diff --git a/plastics.lua b/plastics.lua
index 3ac0f98..e29af53 100644
--- a/plastics.lua
+++ b/plastics.lua
@@ -10,6 +10,7 @@ minetest.register_craftitem("basic_materials:plastic_sheet", {
 
 minetest.register_craftitem("basic_materials:plastic_strip", {
 	description = S("Plastic strips"),
+	groups = { strip = 1 },
 	inventory_image = "basic_materials_plastic_strip.png",
 })