In many cases, a design is not successful for reasons that are difficult to pinpoint. I would like to get your thoughts on some of those issues. I have encountered handling issues such as tracking in a following sea making the boat difficult to handle in a modest seaway where the solution was properly sizing the rudder. I have seen design lives extended and options added making the performance of the boat difficult with the available propeller diameter even if the additional horsepower is readily available.
Please post your performance issues and maybe we can get to the bottom of the issue and resolve the problem.