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Utopian got 99% of this already.

Here are some thoughts that might
fill in that last 1%...

The Norton Combo is a man made hone that I think
of as a cast or molded mass. I think of plaster...

You have a 4k/8k combo. Have you lapped the top one
or two mm off the top of the Norton?

Inspect the WiKi for the pyramid honing method.
I found the pyramid method to be as close
to a...