I have an 07 silverado ext cab. I am in need of some serious help building an enclosure for under the rear seats. Right now I have a dual 12'' prefab box(yeah I know). It is taking up the entire back of the cab. I would like to build a fiberglass enclosure for 1 good 12''. I have absolutely no experience with fiberglass. And to be honest no experience building boxes either. I have a planet audio 1200w RMS amp. The wires are ran, but I need to clean them up a little. If someone in the indy area would like to spend a weekend day helping a fellow car audio guy out that would be great. I would be more than happy to compensate or trade for HVAC or electrical work. I can also get a really, really, really good deal on GM accessories.