Look back a few weeks, as there was recently a thread on this very topic.I am trying to fix the same wobble issue. I still have the shims and bolts, and was thinking of replacing with a thicker material,- thanks for the plexiglass idea. As I looked at them, and I took apart the housing at the top of the rudder,I noticed the rubber lining (between the metal and the rudder) was torn and worn away. This is my first year with the 23.5, is this something I need to look to replace or is it reparable?