Please help, I'm about to throw in the towel. I have spent months rebuilding this roof with my dad. We put it on and the back side bows outward leaving a gap big enough that I cam fit my hand between the roof and the base of the camper. Obviously not water tight. Please tell me there is a fix. I'm about to take it off and just take a rubber mallet to try to get in place. We measured so many times during our build to make sure it was within the width we needed. I'm at a loss. The front side sits flush and perfect. It was my childhood pup that had ice load and the roof failed so it was a total gut and rebuild.