I have a 17ft bowrider and the transom is a little loose. The engine has a little too much play in it and you can see it pushing the transom in where the engine mount meets the boat. I've read where you put in double layers of marine plywood, glass it in, but I'm not sure where to start with this one (I've never done it before). You may be able to see what I'm talking about when you look at the pictures. Where do I begin cutting? The back seats and well are all molded directly to the rest of the hull. The gas tank is under there too. I sure when someone could recommend a spot repair for this one. The rest of the boat's in pretty good shape and so is the engine. Recommendations?