If you don't like the size rules then you're welcome to create a new class of boat! The changes you're suggesting would mean that new boats would essentially no longer be A Class cats! The size rules are there to ensure that everyone has a level starting point. If new boats had different...
The A-Class is a development class and I applaud DNA on what they have achieved within the measurement rules. I'm looking forward in seeing them here with the other new designs for the 2014 Worlds!
I'm interested in putting a set of winglets onto my rudders. One question that I would like to ask - is there a formula for positioning the winglets onto the blade?