Read this document on how to make a spin setup it has some drawings that might help.



go to folder at



http://www.geocities.com/kustzeilen/Genaker/



There you'll find a word97 document with vector drawings and a decribtion of some 10 pages.



There are also some pictures in the same folder ; one showing the back to back harken blocks.



It also described the way a spi is rigged to some extend



Hope this helps.



Wouter