It gets pretty hairy at 22 knots on my A-cat, besides I'd like to keep this sail for a while! Actually I haven't seen one break yet because of wind. At the Hobie 20 Nationals last November 2001 it never got over about 20 and it was a lot of work but fun. The 2000 Hobie 20s/ Pensacola one morning it was close to 22 knots and many did not go out to race: those that did were doing repeated cartwheels including Woodie Cope. Tough conditions.