The square hole on my gimble ring is starting to wear where the swivel shaft goes through. Play is very slight and boat is still very controllable. I've read that the only way to really fix this is pulling the ring and replacing or rebuilding it. It seems to me that if you could get a very thing piece of hard metal in there it could shim it enough to get a good portion of that slop out. More drastic would be to drill through the ring itself and tap a SS bolt against the swivel shaft. I'm sure I'm not the first one suggesting this so there has to be a very good reason why this is a no-no (right?)