I. Have had both furling 150 and mainsail made for our M17 and a furling 140 and mainsail for our M23 built by Don Yager from Spokane. Outstanding quality designed and built in the USA. btw, I'm from northern British Columbia and swallowed the Canadian dollar against the U.S. And still used Don because he makes a great build and I don't want some sweatshop derivative offshore. Bruce Sent from my iPad