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“After giving it more thought, I decided there's no reason I can't use the same stones for knives and razors.”

You can, but I too would use one side for knives and the other for razors. A knife...

Another vote for Diamonds, a dual grit 400/1k plate from CNTG at $30 is a great large knife hone.

Also, large vintage dual grit India stone are inexpensive, easy to find and quick cutters.
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