I wouldn't sharpen the Gyuto, utility knife, gokujo, slicer or nakiri beyond 5k. Anything more and you will see your edges failing quickly. Can you
Already checked with him, he's sold out
Reason I'm asking around here is some of the vendors I was looking at that had these things
Just ordered copies of Keller's French Laundry Cookbook and Ad Hoc at Home, and Pepin's New Complete Technique. Let the learnin' begin!
James also carries the Tanaka R2 line of knives and is a vendor on the forum.