2007 21RS Shamrock rear slideout support issue
My first post, as this has been a reliable trailer (knock knock). Seems the internal structure of the rear wall of the trailer below and to the outside of the rear slide has broken, leaving a diagonal crack in the exterior skin, and a bulge outward in the rear wall, allowing that side's slide to drag on the trim around the opening. How is this rear wall constructed? Internal (now broken) plywood where the slide-out bracket is attached to the rear wall, or maybe attached to the aluminum frame, or both. I'm not big on appearances, just would like to get it fixed, based on how the rear wall is constructed. Perhaps adding angle iron across back wall, or plywood reinforcement, on inside. Any knowledge of what's in the wall in this location would be appreciated.