Hi Chuck, I saw your cover story today and can show you may experiences making and sailing a polytarp sail - in this special case my "Gibbons/Dierking" rigged proa P5. You remember the little sister of it, the P3 of the last year contest? Yesterday I sailed it in good conditions, first solo with a flying ama at good speed. As you wish I can send you some fotos of it. Regards Othmar www.multihull.de