I purchased two Duke's in 5.4/5.8 as part of a wholesale change of brand from Ezzy to Duotone. Great service and help from Sam and the Baker Boys and a great sail. Light in the hands and pulls well giving great control and effortless jumps. Helpful tuning guides make for easy rigging and tuning and the sail seems to have good wind range. Early days but really pleased with the change so far.
