b'EASE WHEN YOU NEED IT."A few of us started incorporating theZircon bearings with the development of the GP mainsheet system on the Nacra 17 ahead of the Rio games. Weve tested systems that were rigged with 10:1, 11:1, 12:1, even up to 14:1 purchases, which we now use on the A-Cat class. Even in light air it is still possible to ease sheets effectively. We used the commercial version of that system at the Enoshima Olympics. Since then, Ive been using single sheave Zircon prototypes on my Exploder A-Cat and Bieker Moth. I move the test blocks around with me! I find youre much better engaged with the sailyou feel the trim differences much more acutely. Theyre more expensive for sure. But I like that Harken makes the highest quality products it can and leaves it up to the athletes to make up their own minds about whats best. Riley GibbsUS Olympic Sailing Team4'