Join Date: Aug 2006
Location: Arlington, VA
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I've had a Leisure Furl system for the past 3 years. Love it.
I think you're much better off planning for a new mainsail, because there are subtle differences which are important. It's best to have a mainsail built especially for the LeisureFurl. I had one built by North Sails in Annapolis...full battens, large roach, dacron cruising sail. It sets beautifully at any point of hoist.
An existing main would have to have significant modifications at the foot, luff, and possibly elsewhere. Consult a good sailmaker for a more definitive answer.