Taz 4 or 5 Bearing and Extruder Holder Mods

This mod addresses the slop in Taz 4 (or Taz 5, 3, etc.) bearings and extruder holders.
The slop translates into uneven surfaces which are readily apparent on large flat horizontal surfaces, but also affect every other print in some way.
There are a few mods here and you can try all or one at a time.
First off, the bearing holders on the X carriage. You will notice that on a Taz 6 that Lulzbot started using bearing holder without a break in the circumference. There are two replacements here