Hi everyone. I decided to change my carpet on my 91 170 freedom four winns today. Sadly ( not really to my surprise), I found the plywood boards under the captain's chair rotten. It seems like the floor consists of there are 4 sheets of plywood layed up against composite (fiberglass). Does anyone know how these boats were built? What I mean is are the stringers made out of wood (most likely) and where else is there wood on this boat. It seems that if I go aft where the battery sits, the deck is straight up composite. Please help. I don't want to have to end up scrapping my boat. Thanks all.