Search:

Yes. I would like to see evidence of Livi only honing up to 3k.

I am linking a video that shows Livi honing a new razor. To my non-expert eye it looks like he goes way beyond 3k.
...

He concludes that the particular razor he was examining wasn't fit to cut wood, let alone a beard.
238919

Using magnification during razor honing goes back until at least 1884. Look at the second page of this manual.
https://archive.org/details/artofhoningrazor00lone

I remembered Robert Hooke and his...