i tried to see how Rev1 is acting with springs like Reflex and is doing exactly ta same only differences remain the slow react and great grace on movement so...i go further with the risk of destroy the sail. Now i have a Rev 1 75% vented and the test was made on September 1 around 6 PM on Prat beach Chicago hawing 16 to 20 MPH estimated wind from N-NE and is flying great.