I am having some real issues with the rudders on my N20. About 6 weeks ago, the eyebolt that fits over the top gudgeon and is used to adjust rudder rake sheered off leaving half inside the casting and the ring on the gudgeon. when the rudder flopped over, it broke the lower gudgeon. This occurred while sailing downwind with the kite up in about 20knts of wind. I replaced the eyebolt, and lower gudgeon. Yesterday, sailing upwind in about 15knots, the same thing happend. Neither time did we hit bottom or any other object. The rudders were tuned with only a slight weather helm (I like the feel). About 5 threads showing on the eyebolt. Any thoughts on what is causing this and how to solve the problem?