I bought this boat about three month ago and I knew of this problem and i plan on fixing it now. I have taken it on the water multiple time and i dont see the transom flexing or acting like its flimsy. The transom has one small peice of plywood the aluminum hull then another peice of plywood. The major rotting is on the inside peice of plywood around the upper drainage holes. This peice is both rivited in and is welded in by the aluminum brackets. Ive attached photos and I would like to hear what you guys suggest. Thank You!