I noticed on our 89 Catalina 30 there is a plastic,nylon ring around the rudder post just above the rudder that is loose. I can slide it around and lift it a little. I can also lift the rudder straight up about 1/4 to 3/8 of an inch. Does this need fixing ? Is this common ? How to fix ?Any info would be great or leads on where to find more info would be great.ThanksCM