We recently purchased a 1995 Catalina 320. We so far love the boat and everything seems to work just fine, except for the second reef in the main sail.Since single-line reefing systems are new to us, we missed the fact during the demo sail that the reefing line for the second reef seems to be stuck. When the moving block in the boom is towards the tail-end of the boom, the line that pulls down the head of the sail seems to move through the block in the boom ok. But when I pull the line tight and the block moves forward towards the mast-end of the boom, at some point, probably when it reaches the front-most position in the boom, the reefing-line blocks and I cannot pull the reef fully down onto the boom. It seems to me that the block somehow is twisted inside the boom.There does not seem to be an easy way to open up the boom and inspect the block inside. Everything is closed with rivets. I was wondering if anybody else has experienced this problem and if so, how did you go about to fix it? Or perhaps I am missing something or doing something wrong?I have not contacted Catalina yet, but figured I'd post here first to tap into the experience of other owners.Thanks for any suggestions!Regards, Koen