Picked this up on SA: " On an older A-Class with smaller transoms, the conversion from straight to curved boards may have a better chance for improvement if rudder winglets are also included in the upgrade.
There's no doubt that curved boards are here to stay. "
http://forums.sailinganarchy.com/index.php?showtopic=144251#entry4037605I suppose, that if that is true, we should address the issue in the rules.