Mucho - What's this thing, "phone book"?
These were used to polish the carbon steel blades of dinner knives along with other machinery designed to clean and polish the patina off of dinner knives.
Jon produces a hell of a stone. Kono HD will get sharp. Sounds like you've got a good routine too. Slicing loosely folded phone book paper is my reference
Price drop, Shig - $370 + free international shipping
Harner - $150 + free international shipping
Simply museum quality. Wow Randy