Slappy, if you haven't already discovered it for the Mustang, check out www.Zainobros.com for their show car polishing products. Outstanding products that deliver, and Sal Zaino will give you tips on the phone (i.e. removing hardwater stains, etc.). Great guy, great company, great products.
Oh, and nice developments in the system, too. I like that you're using stereo subs, and have placed them next to their corresponding monitors.