Tom, I sail with an Ullman .5oz spinnaker on a fairly regular basis (25 years old - stored indoors in A/C'ed house) and it seems fine over the years - of course one day......Check with Keith Magnussen at Ullman Sails Newport Beach - and lucky for you - the 'Fall Sale' is on! (bought mine on Fall Sale - great deal) NFIW - they just sell me sails Keith Magnussen - 714-432-1860 (w) 714-206-1002 (m) "Take advantage of biggest sale of the year and receive up to 25% off sails for your boat. Call Today for details: 714-432-1860 Offer Expires September 14th 2015" Judy B. may chime in here too. Jerry M. has a nice chute we used last year at Dory Taylor Cup for Cruiser Challenge - real nice sail too - Jerry?? - are you building a boat in Colorado?? I am not sure who made that sail - nice one though. Good Luck, Have Fun, Go Sailing - still too hot here but SOON! Photo of excellent crew/M-17 'frankenstein' owner, Craig Painter watching for shifts. Second photo (maybe) (credit: Michael Hess or S.Mulligan) - Three Stooges - J.M. , S.S., yours truly. GO In a message dated 8/31/2015 3:03:00 P.M. US Mountain Standard Time, Thomas@thomashoweonline.com writes: Flew the 30 year old spinnaker on my M-17 over the weekend, it's a .5oz spinnaker, and it began to rip. I used the Sail Ripair tape, and patched it up, but I'll need to replace it fairly soon. I'd be interested in what the group thinks make a good spinnaker, and how they'd replace what I have. I'd really be interested in input from Hyde Sails representative here, and any other M-17 sailors with experience.