I don''t know if you can help,but we purchased a new club 420 last spring. Within,3-4 weeks we observed various stress fractures, a warped centerboat,and a "popping" sound on the transom when my son placed his "Navy" sticker on the stern . It was as though the hull was not "together." I am concerned not only for my childs'' safetey, but this is a lifetime competitive boat. We were told by the company that stress fractures are normal but so soon ??? I am at a loss for words and don''t know what to do! Any suggestions would be greatly appreciated!