Been flying dual line and Revs since 1988 vaction to Lincoln City, OR. Got kites for family bonding - I bonded with the kites and the family went shopping or walking the beach. First Rev was Rev I followed the next year or so by Rev II. Favorite is Rev II, vented 1.5 SLE, and Vented Rev II. So far, suck at no wind 1.5 SUL.