I had to make an assumption in here, but here's what you asked for as far as I could figure out --Vector implemented globally. With the implementation suggested, this must be a global or else the metamethods don't know what a --vector is. Take a look into scope if you want to know more on this. vect...

I think this is what you were looking to do item_mt = {} --This sets up item_mt as a lookup. --__index is a metafunction which is only invoked if an index does NOT exist in the main table. item_mt.__index = item_mt --We can define a function on the base. function item_mt:base_cool_function() print(&...