If somebody has any spare mdf or uses the circle cut from a 15" box... I need to get a 12" circle cut the exact size of the outside of a 12" sub. I have a dual 12 box with flush mount baffles so I'm going to close one side off with the piece of mdf and double my airspace. I'd just go cut some myself but a) I don't have tools b) I don't want to buy a sheet of mdf just for this and c) I don't have tools. If anybody will do this for me, let me know how much you'll charge (don't want to spend more than $15 shipped though -using usps for monetary reasons)