Looking good. One last thing is that you don't want the amp to bounce around so maybe put some high density foam under it and between the amp and the tire (don't cover all of it or it may overheat) Just enough to keep it from banging on the bumps. Cars really are ferocious environments for electronics. I mounted my amp in the space between the battery and the trunk latch onto a sheet metal plate I cut from some scrap at work and then put rubber feet under the plate and a couple of those really thick furniture sliders for hardwood floors on top so that the tire would hold it down firmly.