Paphman
1) Self-tailing winches do not require the use of cleats; the self-tailer pulley is essentially a circular jam cleat: it locks the sheet into its toothed groove so it can't slip. When the winch is cranked, the pulley turns with it, picking up line from the winch drum and expelling the tail automatically. Result: since there's no cleat knot to untie, you'll be able to let the sheet run much faster than you can now.2) It's very easy to release a self-tailing winch under load, and this is where these winches' cleverness is most apparent. As the wind builds, just make sure you have increased your lazy two turns around the drum for light air to at least three turns around the winch to give you the extra friction around the winch drum. Then it's those turns take the load: the tailer is under the least load. You'll always be able to release it by simply "unwinding" the sheet from the self-tailer with a large circular motion until it comes off the tailer (about 3/4 circle), and viola! your hand is now belaying the winch turns. Just make sure you keep your hand a foot away from the winch and make a big circle motion to release it, and you're completely under control and the winch won't eat your fingers. But that's true when handling any winch under load.An extra benefit of self-tailers is that you have a free hand to use to steady yourself, hold the winch handle, or whatever.I sailed my own C22 without tailers, and to have had them would have been a dream when the breeze picked up. If you can find a pair that will mount on your coaming, I wouldn't hesitate. They will be worth every dollar.WRT those blue rubber rings that simulate the action of a self-tailing winch. They're inexpensive and some folks like them (see previous post), but I could not find any small enough to fit my little C22 winches, so I cannot comment on their actual performance. Measure across the top of the drum (the flared upper lip, not the drum's actual diameter) before you go to the store. You will not have lost much if you decide to mount actual Lewmar self-tailers after all.Fair Winds,Jeff