The reason for the hull number and you are good to go, the first 20 from the factory had a short compression post causing issues with rigging and the slider closing and opening badly. I had an early one and Catalina came up with a fix. Frank called the customer who was aware and it would be resolved quickly. I held up delivery for two weeks which my customer appreciated doing that to make sure all was ship shape. Spacers were added to the compression post which not only solved the issues but actually better than later models. It was great that the mfg. came to the rescue