Ok, after returning from fishing last night, noticed a small (size of a silver dollar at most) spongy spot in the floor of my 78 Cajun Mk IV. This is right in the corner by the seat on the port side gunwale against the floor. I first thought it was the top cap and some screws were loose but no, it's definately the floor. I DO plan on new carpet sometime between now and the end of the year. Anybody got an idea on how to fix it PROPERLY without having to rip crap up?