Having an odd problem with the side door on my 2015 Redhawk 31XL. The door will not close without slamming hard sometimes (and then is just as hard to open). Seems to happen mainly when it has been baking in the Sun, or local temperatures have been high (happened first time when it was in Alamogordo for an event and that side was in shade most of the time). Stepson says the frame is out of true and I need to grind the door down a little. Doesn't make sense because most of the time it is OK.