I have a 22 ft seaark. The floor is 72in wide. All aluminum. It pops in several places due to wollered out screw holes. I bought the boat last year and it has been repaired quite a bit by adding New screws. But they just don't seem to hold. Any ideas on what to do? I thought about marking the holes that hit a stud or something hard and use a bigger screw in the same hole. But it seems they used the biggest screws #14. And I can't find anything bigger without going to a hexhead. Don't want big and,bulky if I can help it.Thanks