Looks great! You should build your own wood(or fiberglass) + plexi box for that battery.
When I built mine I wanted to be able to access the spare easily and be able to return it to stock in minutes(ironically in case of an accident). The only bad thing was that it became wedged in after the accident and I couldn't remove anything other than the equipment. I would have liked to give the pieces to someone else to put in their Contour.
Pics 
