I was thinking of replacing the carpet in my boat, so I starting taking up the carpet. I notice a soft spot on the floor before I took the carpet up, but after pulling it up I notice I few knot holes that were loose. What is the best way to fill in the knot holes and stiffing that little area up. I went to rotdoctor and he talks about drilling hole half way through the floor and then injecting some epoxy in. Is there any thing else I need to know, thanks alot