Hi Russell,
With Altered I supplied sailmaker with, meausrements all from mast base, spin. hoist height, spin. pole length (recomend about 3m), width to spin. sheeting position (suggest sidestay), then end of pole to spin. hoist height, spin. hoist height to spin. sheeting position and finaly end of pole to spin. sheeting position. Then gave him F16 meausrement rules for spin. and asked to make it to those parameters.
Hope you have looked at Mosquito Vic. website for rigging suggestions lots of good photo's etc.
http://home.vicnet.net.au/~mosquito/spinnaker.htmRegards Gary.