Old V, need Advice

[Stillrunning]

I agree with others and it sounds like you may have stringer issues. When you decide to take a look you can take the boat apart by removing the inner liner of the boat. This way you can get to all of the stringers without cutting up the boat and also repair the flooring from the under side of the floor without cutting up the top decking. I took mine apart when we replaced the transom and I'd bet if you have stringer and flooring issues you may also have transom issues at some point if not already. It could also be your flooring is flexing due to stringer issuesa and the flooring could be fine.