Not the best session. Found that the metal race doesn't actually seem to fit the bottom of the CB100 steering head. Had to go with old fashioned loose ball bearings.
Also discovered that S90 fork bolts are way too short to use with the CB100 bridge. Was cinching up the left fork using the temporary long 10mm bolt and ended up wedging the top of the fork into the bottom of the bridge. Had to use a hammer to knock it out.
Rear wheel installed with no issue, but it's a no go on the front until I can figure out the fork situation.