2X. I agree I like the tire back there but don't like how far back it sits. (still happy with it though). I thought of what you are doing but wasn't feeling nearly that ambitious/adventuresome. Cant wait to see how it turns out though it should be pretty sick. and i'm not concerned about the hinges at all they're pretty solid. my only concern is the sagging that the rest of the door will suffer and the mounting area of the hinges. not failure, just some yielding that could mess up alignment. Still think i"m going to reinstall the subs though and see what happens. (had to open them up and take them out cuz they are bolted to the door from the inside of the box...)