If the piece isn't strong enough to span that length I wouldn't buy it, so no you shouldn't have to reinforce it , if your a fan of over kill x3 then ya, by all means slap some straps in it and slather them over . but most of the ones I've delt with have been plenty thick but i've never delt w/this company .

and yes you can just bolt it to the same holes "if that's what your asking ? " there should be a few that will lay where you can get to them . but do you want to crawl under there every time to pull it off ? or is the whole point to make it look stock w/no showing pins ?

your not bolting it up are you ? that would suck to take all of them out when you need in there ?

hope that helps
T L