On the French Sailing DVD Glenn Ashby says in an interview that his top is often around 300 mm twisting off, as taken from what would be a perfectly straight leech.
Wouter,
Do you have source for this DVD? Is it the one on Multihulls-world website? I can't seem to create an order there... <img src="http://www.catsailor.com/forums/images/graemlins/confused.gif" alt="" />
Mike.