Rockwood Roo's and Flagstaff Shamrocks are the only hybrids that have laminated ends. The outer layer of that front panel, the fiberglass and luan, extends past the foam and inner panel at that corner. They then screw through that into the sidewall panel and those screws will be visable when the corner trim is pulled off. They don't use many screws there, and that is all that holds the corners together. The OP may get lucky and all that has happened is the screws let loose from either not enough of them or they were stripped when first assembled.