This used Thunderboat Reproductions hull came to me in pieces. Before I began fitting all the parts back together I opened up both sponsons & stuffed them with pool noodles & added klegecell bulkheads for strength. If you pancake land one of these in a blowover without adding the pool noodles & bulkheads the decks will pop open. Carbon fiber has been added to the engine well bottom and also side areas to strengthen area around engine.