Most of the comments on this subject concern the weldment between the post and the oversleeve that connects to the rudder torque tube. On my most recent annual 2 weeks ago I noticed that the rivets connecting the sleeve to the torque tube had partially sheered, allowing slight movement between the sleeve and torque tube. These are the stainless steel rivets which in my case did not appear to retain the pull pin which leaves only the hollow rivet to take the sheer stress. I drilled out and replaced the existing rivets with stainless rivets with a monel pin that remains in the hollow rivet greatly increasing the sheer pressure.

I would suggest that everyone check their rivets for tightness. The problem showed up after 725 hours on my Model 5.