For a long time I've been toying with the notion of putting a pair of 6x9s in the back. For no particular reason other than I've had a pair sitting around for years from my last vehicle. Well today boredom finally got the best of me and I busted out the grinder. Here's the results. It took about 2 hours per side, including taking the panel off, putting it back on, and wiring and soldering. After I cut out the hole I cleaned up the sharp edges with a file.
Ouych, abo 2 hours per side? I used my dremel and its long neck attachment thing and it onyl took me about 15 minutes to cut and file each side, a few minutes to attach wiring, and everything went right back in.