Stock on the Capricorn - as others have said, tape the retainers once adjusted, and use shroud boots to cover the threads. F18 rules say they cannot be adjusted while racing, but ok to adjust between races. If you are racing HCA regattas, they're not allowed at all - but someone would be digging pretty deep when filing a protest on something like that. If you race mostly HCA races, I wouldn't put them on. If you're recreational or Portsmouth, I think you'll very much like the convenience. <img src="http://www.catsailor.com/forums/images/graemlins/wink.gif" alt="" />