I have a 1984 Starcraft that my father gave to me and I was having issues with the door lining up correctly. I noticed that the side of the door frame that is towards the rear of the camper is not square with the floor. I read here that this is often caused by the weight of the bunks causing the side of the camper to buckle due to wood rot of simply deterioration of the structure. However mine is not square even when the bunks are in and the whole thing is closed up. I took a level to the top of the box and found that while the wall on the tongue side was level, the wall on the rear side was not (lower towards the back). Then I took the level to the bottom of the side of the frame and found the exact same was true. So it appears that the wall is perfectly level with the frame, but the frame rear of the door sags in the rear. On the non-door side of the camper it does not appear to do this. Is it possible that the side rails of the frame have gotten bent? I haven't climbed under it to check the main pieces of the frame. If this is the case, what is the best solution? Thanks in advance for any advice!