My '82 has a wire traveler with a loop in the middle to clip the mainsheet. this would seem to allow essentially no traveler function. On some parts lists I see rope travelers listed, and traveler blocks. So which is it, the wire or rope w/block? Which is class legal? If rope w/block, how is it rigged to limit additional purchase which would seem to be a class issue? Is the block tied off to the end of the main sheet and allowed to freely move along the traveler?