Build a melamine rack and you won't have issues. I built a 32 qt and back heat wasnt cutting it for me either. Loosened a few screws and snaked 4" belly through and dont have an issue so far. And its cheaper to do it yourself....
Just a question, how heavy is the rack?
I have also heard that melamine can warp because of humidity?
I couldn't build a rack on a bet so I don't know.