Im working on a 17 foot Larson Lap line boat. great shape other then for the fact that the whole floor and trasom was rotten. i was told by a boat building outfit here in town that i should remove all the foam from the boat. And then what? the foam is what supports the floor and im not into boating enough to figure out what to do to stiffen up the bottom of the boat. I am hoping that someone might be able to give me some ideas.