I just spent 2 hours with a Dremel tool carving out the inside of my custom box. I got the one that fits in the little hole on the drivers side in the hull in our trunks. It would have fit any other 10 in. sub just fine but I got an Alpine type R10 with the thick as magnet. Anyone else had this problem? I think I have it where it fits and hopefully doesn't rattle on the box.