I can't believe my boat is the only one this has happend to.My Catalina 28 MK II has an in-mast furling mainsail. To install the sail, you need to feed the luff line into the mast groove while the mainsail halyard is hoisted.As I was feeding the luff line into the groove, my 1st Mate pulled up on the halyard, but what I didn't realize is that she was using the winch to do so. There apparently was some resistance, but the winch allowed her to keep on hoisting.Now the sail is halfway up the mast and is completely jammed - won't go up or down at all. NOTE: halyard itself is ok and not jammed.I'd appreciate hearing any tricks, slick or otherwiser, short of cutting it down, to unjam the sail. Thanks!Mr. Lucky