Rasta lookin' great except one thing I noticed... the sub enclosure appears to be 3" too deep on the one side. I'm not sure you can fit it in there. Did you dry fit it? I noticed the OP never constructed this design, only measured the compartment. When I
built my box, the area allowed about 5 1/2" of depth on one side and about 7 1/4" on the other. Also it appears you picked up the
Elemental Designs Subwoofer 110v.2 that calls for .4 cu ft min air space, which you'll probably be ok with. However I noticed it specifies a mounting depth of 6.125" which may not fit in the upper portion of the OPs design. Couldn't help but notice this... hope I'm wrong!