OK good, Now how do you get them back off when you find out the shims you chose were wrong?
This is my method.
Get an identical set of pinion bearings (same brand) and use a scroll sander to sand the inside till they slip firmly on the pinion.
Now setup the pattern till you get it right.
Then install the new bearings with a press or set the pinion on a block of wood and use a pipe of the proper size to drive the bearing home.
Don't use the bearings you opened up for running the gears as they may spin on the shaft.
Disclaimer: I don't claim to know everything, but I try.
