slugs catching upon raising main
The systems that I checked into include the Harken Battcar, the Antal, the battslide, and the Tides Marine. After talking to a number of people (local rigger, sailmaker, SailNet rigging shop), I settled on the Tides marine thing as the best bang for the buck, esp. given my existing mast groove for slugs, which is really difficult to get to work well. Now my gut says that for a 20+ footer it should be possible to make it work, since the loads are just sooo much less than on a 40'' with an extra large main. I don''t remember the battslide maker, but maybe the guys here at Sailnet can help you with that. The Tides Marine stuff sells for $17-$20 per foot of mainsail track, including sliders, etc.. On my boat, that came to be $1000 vs. over $3000 for the battcar or antal systems. Plus, the install could be handled by myself.