NeilPryde X6 still the best so far for me. No problems after two years. No other have the pulleys in the correct angle.
There is no need to use a crank now days for any good design sail. Sails Designers have lover the tension in their sails. I see a lot of people using cranks and they all broke their pulleys in the sail due to over cranking that crap.
No problem with sand or saltwater in two years and I dont even wash the part in fresh water after using it. By far the best.Neilpryde X6.