Hi Cor! Thank you so much for getting back to us! I am very glad we were able to help find the problem. Now, as has been said, you need to get it fixed properly. It may just be that Damon didn't properly screw the back wall to the floor. Maybe it was cut wrong, but in any case it should be fixed so that, years from now, when the coach is long out of warranty, you won't be faced with an expensive repair
Keep us in the loop.
2002 Damon Challenger 348