Jack, you're talking of Mike Krantz's technique - is there a document or a link you can provide? And Jake, do I understand you right that less crew weight results in higher spreader rake and vice versa?
I have to re-adjust all parameters (spreader-rake, diamond tension, mast-rake, and side stay tension) since I put a pretty recent sail (Ashby 2004) on my A-Kat from 1997. There are so many parameters to gamble with - where to start? With the current set-up I have the feeling that my boat is too sensitive to gusts.