the bass box was custom made by sound innovations in California, great guys, i saw another post of a guy who had them build him a box, and the owner of the shop has a cayman too, so he used his own car to make a mold, to make the enclosure for me and then they shipped it to Florida,
the one i saw before had 2 JL 8's , i wanted one 10'' Hertz Mille
so i do have to move the box to flip the flap down, but i used a very easy connection system, and the box is wedged in place well enough not to move around, but its not bolted in.