Jon, there's a pretty good fix for a wobbly shaft/housing fit that involves boring the top of the housing for a Torrington needle bearing, and adding a hardened steel sleeve at the top of the shaft ground to be a close fit to the bearing. I make the sleeve from water-hardening drill rod and shrink fit it to the shaft. Then a grease fitting is used in the hole where the grease cup, spring and plastic disc were installed originally. A tiny squirt with a grease gun about once a year keeps the bearing well-lubed.
Jerry
