hey guys. sorry nazar hasn't gotten back to you sooner. i am his business partner and one of the guys who builds these boxes. we are a designer and retail shop so we are the first and last guy but a lot of this depends on the middle man (fiberglass shop). the enclosure is already at the mold shop and we should see it in about 2 weeks. the airspace will be the same for both the 10 and the twelve. we design most of our enclosures around the jl 10 w7 because its what we deal with the most. feel free to shoot me any questions and i will respond as quickly as possible. again...sorry for the delay.