Dah I was guessing 90x40 but changed my mind at the last second lol.Here's the pair constructed in rough. I'm gonna get to work on the bracing and finishing touches this weekend.
You were right about the enclosure volume, btw. I overcompensated by about 0.7 cuft after woofer, brace, horn and port displcement. Actually, it'll be more now because i guesstimated the horn displacement with a 15"x8" mouth. So some adjustments will definitely be made and there will definitely be a marked improvement with that and the foam!!!
Adam