Ok so here it goes. I noticed my hatches on my boat coming loose so I was gonna get new rivets and redo them all. However the old rivets wore a bigger hole in the fiberglass and now I cant get the rivets to work. So I thought I will put a wall jack (one of those little white or blue things you push into your dry wall to hang a picture) and it worked out perfect. Its actually stronger and more stabile than it was before. and i have a 21 ft ranger comanche and my hatches are heavy. when I say wall jack I mean the ones where you drill a hole in the dry wall and push a white plastic wall jack into the dry wall then put a screw into that. So I did this 6 years ago and have not had to replace them yet. Hope this helps out bc it was a quick and easy fix but has lasted a long time.