I need to cut a hole in the top of the bow above the U-bolt to replace the U bolt. It can not be acessed from the cabin around fuel tank and the expanding foam in the front of the boat. I am planning on trying a hole saw, but running it backwards to keep from pf&^king up the paint and gel coat, if I am headed in the wrong direction stop me please!!! I have a plan to seal the hole with a bow light and silicone so it can be acessed again in the future. Thanks in advance guys.