i bought a brand new upper from ford and it has deformed in exactly the same place as the old one had even though all the holes are bolted and i have put large mudflap type washer on to spread the pinching load points where they tighten up, the other idea i had was to fill the back of it with expanding filler foam, becasue if i lie down and push the deformed parts out from the back they look fine, if the fillerfoam was along the back would that help keep it pushed out...