Bungie in light air is very unobtrusive IMO; is never as much trouble as getting battens to pop over (i.e., if the battens pop by themselves, the mast will rotate by itself). You'll never have a problem gybing. NEED forced rotation to get max rotation downwind, hold the mast still in chop, and usually to get best rotation angle upwind in light air. Don't think mast/boom/sail "work together" like an 18, and I'm not convinced that system is all that good. Let's put it this way: All the Olympic Tornados have forced rotation, and not via bungie, either... I like this rotation setup; same as mine but the slack is carried to the center; slick method for no hanging lines. No mechanical advantage, though.

Man, this is a 20, it ain't a crew-on-holiday, adjust it with a hammer 18 :-)

Chris Bolton