How am I supposed to make speaker rings without a jigsaw. I broke that piece of shit and have been using a handsaw, but how am I supposed to cut the inside ring without it? I wanted to start the fiberglass tonight. But I guess I could fill you guys in. I got tired of the crappy walmart boxes for the crappy Sony 12's and they take up a shit load of space. So I decided to make a custom enclosure built into the side of trunk area in the Audi. I wanted it to look a little better than just a sub stuffed in a flat piece of carpetted area, so I'm giving it some dimension, thus the rings. I have this ungodly obsession with fiberglass but I'm not over doing it. This one is boring... It's going to look more like this one. on both sides.