I have an older Carolina Skiff 19' dlx that the previous owner screwed to the floor,these screws pulled out. After inspection, the floor is only fiberglass and foam,no wood, the glass is thin and will never hold a screw. I plan to build a deck out of PVC boards big enough to hold the console,fip/flop seat and front cooler, these can be screwed to the PVC. What kind of glue do I use to attach the PVC boards to the fiberglass floor???