This is the first time I have heard good things about qforms... always assumed that it was very generic and just trying to make 'most' speakers sound decent...
air space on the prefab is .6 cu ft; and the boston g5 asks for .5 cu ft
I have multiple pics of the sub box, but this should give ya an idea:

(that is a penny on the rim, and it comes together in the middle rather odd)
I am making the trip to the shop at noon thursday (today). So any further advise would be most effective before then.
Thanks for all the help so far