We are trying a 2:1 cascade fine tune leading up the boom, which from the 8:1 primary purchase gives the crew 16:1 and leads out from the gooseneck. Not much more friction than just the 8:1. That way the crew is not twisted around trying to trim on the aft sheeting, and it is a lot easier to pull (though more line), which for my wife after sailing 3 long races in 20 TWS is a big deal. Got the idea from a friend with an 18HT who sailed with his girlfriend, it was the only way she could trim the main in breeze.