looks good, but I have a few question:
if you are bashing, won't you want the mud guards on there?
how is the velcro attached to the body? is it just stuck on, or screwed on?
is the body going to fit over that battery? (maybe it is in the center channel of the body, but it looks sorta tall to fit under the side of the body... but i could be completely wrong)

as for the reference to the nuts for the batter box, I second the idea of getting a tap and threading the hole, looks a lot cleaner, and open up more possibilites (just in general, when you can thread something yourself). Check out harbor frieght tools, they have a 40 piece metric (or standard) set for $15-20 when it isn't on sale.