Something i did to help me a lil. I have a muscle torn in one shoulder ,,and getting amp bolted in lol was hard -so ,,i took my cone shaped drill bit and wollared the holes out in mount just a lil..that way mounting it was a lil easier.
I did not drill the hole they requested because i know a dealer and they dont do it eitheir,,the three other bolts are way more than adequate ,,i did take a piece of the foam tape and place it where the hole normally would have been. Just in case that part wants to wiggle it would make no noise banging against metal ,,but ,,its not gonna move period.