Keep in mind

The difficulty is honing the old heavy grinds has nothing to do with them being an old heavy grind..

If you hone enough of them you will come across a few NOS ones, and learn that they hone EXACTLY like a Full Hollow.. They they have this sweet tiny even bevel and are easy as any other razor to set

The problem with these old razors is the honing that was done to them over the last 100+ years.

You have to correct the geometry if you want to get them back where they were in the past.

Nobody honed them in the old days by lifting the spine they didn't need to, unless they wrecked the spine to start

Just like all the other stories about how they were honed "Back in the Day" simply hone an NOS one and it all makes sense.. Easy as pie