Very nice for first attempt, I must say. Nice job.
Frost -
Ported enclosures take about 30-50% INCREASE in box volume. It does look small for a 12, but if you ported it, it would prolly sound very boomy, with little to no bottom end. More like a 12" midbass than a sub. But then again, it depends on the woofer specs. I have no idea what kind of woofer that is.