This past weekend I did a simple mod for a pain in the but problem I always have when i camp. I never have any place to hang coats sweatshirts and towels to dry inside the camper so with that said I didn't want to drill any holes in to my water tight 30 + year old pup roof so i drilled the holes in the extra track that was allready mounted to the roof. It was there for a curtain to close off a portable toilet area (will never put a toilet in pup so was a no brain er.) I hung an 18 inch piece of wooden  closet bar with 2 large eye bolts a few plastic nut caps to prevent injury and a couple of climbing snap hooks. It attaches in seconds  for storage. I am really happy with end result. By the way i had all of the material in my shop so it was totally free. The rack actually hangs over a cabinet area so it is not in the way of walking etc. and can probably hold 100lbs of weight.