A lot of people put a piece of fiberglass or fiberboard (w/o the holes) on the inside of the bag before attaching the bolts to the bag. That's what I should have done, I still might one of these days. They just don't seem like they could carry a lot of weight the way they are. I won't put more then clothes, rainsuit or maybe some tools in them, though I have carried a gallon of milk in there though.
