I bought my Laser used thirty years ago. Hull number is 16344. I haven't sailed it since about 1994. I have cleaned it up and was going through the operation of the rudder when I encountered a problem. If I remember correctly, one pulls on the lanyard attached to the top side of the rudder to raise it. However, when I do that, the top front edge of the rudder is stopped by the rear most rivet on the rudder bracket. There is a small dent in the wood caused by the rivet. I don't recall having this issue when I sailed it. What am I overlooking? The photo attached shows how far the rudder pivots up, which is not much. Thanks in advance for any suggestions.