Jack, the North Coast Championship is a IWCA Sanctioned event and must use the class rules. And that means no extension, otherwise the sailor can be protested.
For non-sanctioned events, I see no reason why you all can’t experiment
I agree that there should be no change until the class follows the procedure for a proper vote.
I personally have no skin in this but I am very aware that there are perceived issues that newbees feel that keeps them out of the top 10. The rudders are one of these, so anything we can do to mitigate these perceived differences will help growth.
