Gotta make sure things pressed correctly.
They'll spin freely at that point, but make a very slight noise due to the new (non-lubricated) bearings.
The magnetic drain plug will capture all the 'break-in' material that comes off the bearings, preventing further wear.
Note that I also applied Loctite 609 around the nosedrive seal outer circumference after pressing it in, and before installing the retainer.
Here'* where they sit now:
That'* 2 hours of painstaking masking.
Still have to do these (a real pita):