I'm sure - the rules state that if it is not expressly allowed, it is verboten. Unless the rules are modified to specifically allow Bobs, you can't add one. That is the catch-all phrase in many class rules. Try proposing it at the next AGM, though - I'll bet nobody objects. And it would take a cold-hearted gutless wonder to protest someone for adding a safety feature. <img src="http://www.catsailor.com/forums/images/graemlins/tongue.gif" alt="" />