I haven't been following this thread, but here are my thoughts which may have already been offered:
My boat came with a 7:1 purchase and cam cleat setup on the traveler car. It worked fine in medium to heavy air, but in light air there was too much friction, and I had to push the boom out by hand. The winch that was available was being used by the previous owner for the jib halyard. I reduced the purchase to 4:1, replaced the blocks with Harken carbon blocks, and used the self tailing winch instead of a cam cleat setup. With the shorter main sheet, the adjustment is faster , and the boom moves out easily in light air. Alan Bergen C&C 35 Mk III Thirsty Rose City YC Portland, OR
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