it's hard to design without knowing what space you have to work with.
i'd say just post the max dimensions you can fit. somebody can design you a good slot ported box and just build another (i know you love building boxes) //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Since you are tuning hella low, i would recommend just going with a slot-portted enclosure. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
of just from estimations i got my max dimentions as 50 x 20 x 19 which gives me 8.697 before any displacement. Thats with everything 3/4 inch except the front which is 1.5