OK then its acknowledged by some that windsurfing sails maybe better aerodynamically than Cat sails, has anybody built and tested a windsurfing style sail for a cat, ie mast within the luff and the classic wishbone boom with a portion of the sail below the boom ? or perhaps classic windsurfing shape with standard baulk rope to rotating mast. <img src="http://www.catsailor.com/forums/images/graemlins/cool.gif" alt="" />