I appreciate that and may take you up on itTo be honest i couldn't see any of that in the video watching on an iphone.
If you're looking to measure microns, then you're already dabbling in metrology.
You're fairly local, if you want to pop over with the crank i'd be happy to measure it with a Starrett 2-3" micrometer that reads in tenths.
At the moment I need to figure out of I'm going crazy or if this micrometer is out of parallel