Rudder post slop & "thunking"
You may still be able to get some factory help. Start with the info at the following website: http://www.homestead.com/fleet7/files/S2info.pdf
If your rudder bearing is like many it is just fiberglass built up inside the tube. I think the West Systems manuals have a section on repairing this. But I agree, I would wait until the end of the season.