So if we are talking about 5knts+ (no laminar boundary layer) you want a fuller sail downstairs and a flatter sail upstairs. I would begin loosening a bit of outhaul (which gives you the lower part) and maybe try with a little more of rotation (which combined with sheet tension gives you the upper part). If the diamond wires are almost slack, maybe you want to try a little bit more of prebend by applying diamond tension, so the mast follows the luff curve better (I think a little of prebend is necessary in all winds). Cheers, Claus <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />

By the way, a nice discussion about under/over rotation and wingmasts can be found here: http://www.tspeer.com/Wingmasts/teardropPaper.htm