I was wondering how much it usually cost to redo my amp. I had a RF 400a4 amp located under my passenger seat. Now I upgraded to my PPI 6600 amp and it cannot fit under there anymore. It has to be relocated in the back so where when you open the back seat from the inside, you'll see the amp rack with the cap. The guy wants to charge me 300 to redo it. This include two new sets of phoenix wire, new power wire and ground wire running all the way to the truck because the wire is too short, vinyling and maybe doing some fiberglass work to get it to match perfectly with my car. However, this does not include building me a new box that will fit my two new 10's. Do you think it's too much?