We store our CAT30 outdoors in the cold chicago winters so we take our halyards down every fall. We learned a trick from a guy at our yard using masons twine to do the job. At the loose end of the halyard loop about 5 half hitches of the mason twine around your line, about an inch apart. Place a small piece of tape around each one to hold in place. Pull the halyard through and this leaves the mason twine in your mast to absorb the winter freeze. In the spring (next weekend for us) we'll repeat the process and haul the halyards back up through the mast. Similar to previous post, we also smear the butt end of the halyard with some teflon grease to make it easier. It may be an extra step for you to go from old halyard to twine to new halyard, but we spent many an hour trying to thread directly from old halyard to new with no luck. There seems to be very little clearance at the top of the mast. Hope this helps and good luck!
