Julien Bethwaite did a study on this in his book "High Performance Sailing" I don't have the book with me, but he tried it on a Moth or something like that and I believe had positive results. Otherwise in my opinion, I think it would be advantageous in the daggerboards, but probably not a good idea in the rudders. In the past on this forum there have been a few discussions about how assymetric rudders are causing all kinds of problems for other sailors. <br> <br>TB<br><br>