This is my first year with my 81 Hunter 27, and on the third sail, I ran into a little problem. Within 5 seconds of the main halyard snapping, the steering went out. The chain had jumped the sprocket in the pedestal. After an expensive tow, I loosened the tension on the steering cable and got the chain back on. I noticed while loosening the cable tension that there is no post on top of the rudder disc, and no visible rudder stops. The rudder does stop moving about 1.2 revolutions in either direction from center. Is it possible its only stopping because the rudder itself is hitting the boat? Should there be some sort of rudder stops on the disc? I've seen pictures of discs with posts attached to the top that hit 2x4's or some other block. I have no such thing.Also, the tow wouldn't have been necessary with an emergency tiller. There wasn't one on the boat. Anybody know where I can find one?Thanks for any helpDave