+1 on the stopper knot. As a crew member last year on a moorings 4600 we didn't notice the lack of stopper knots either and had our starboard sheet blow completely overboard on a port tack. We still had control of the port sheet, so we were able to capture it even though it was whipping like crazy. But it left a nasty burn (and now scar) on my forearm that stung the rest of the week.