I have a 1964 Hydrodyne Tournement Skier. It has cracks, but it is also 46 years old, so finding cracks does not surprise. I have just put composite boards in the hull replacing the balsa core. I may redo the gel coat next year. This boat has had twin 1oo's on it, a 200 HP motor, a Suzuki 150, and now a Yamaha 150. That is interesting to read about the hull formula by the coast guard. I am happy with my boat and happy with this web site. There are lots of great boats out there, and this site does lend itself to water skiing, but it is a Hydrodyne Web Site. Chad