You add one step to the hoist, but have a gybing ball on both sides. Since then, sailing with a variety of crews, I've not bothered to try it, and then recently put those sheets back on the boat. I would not want them on for boathandling drills, but think they help a lot in communicating during the tuning sessions. I did not learn that much about upwind speed, although I thought the new calibration system works well. We should check our spreaders to make sure we are all on the same page.
Boats are still a long way from being properly calibrated.