Kreg, On my C&C 24 there was a reefing horn at the gooseneck. I used it extensively and it worked fine. Eventually, I added a dog-bone through the reefing cringle at the tack, so it was easier to hook it up.
At the clew, I used a reefing line through a cheek block to a small horn cleat on the boom. I am pretty sure that it was added by the PO, but it worked fine, as well. It sounds like you have the blocks. You may want to add a cleat (a horn cleat or a jam-cleat). Additionally, I would use a boom strap through the clew (a velcro tape works quite well) to protect your sail from ripping (if the reefing line gives way). Marek Ex 1975 C&C 24 Ottawa
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