Loose coroplast
My Passport Ultralite has the cold weather package with undercarriage covered with cardboard like material that I have read others call Coroplast. While preparing for our last trip I noticed that two of bolts fasteners holding the coroplast had pulled through leaving large holes in the coroplast. When I loosened the bolts I noticed that they seemed to be hanging loosely and not threaded into the frame or anything solid , like they might be toggle bolts. Fearing that if I removed them totally I would not be able to get them back in I just loosened them enough to slide a 1/4 inch thick plywood disc under them and retightened them. I made the discs about 4 inches in diameter with a slot from the perimeter to the center just wide enough to slit onto the bolt
