Interesting that they put so much value on whetstones. I can relate. I've got three that stay on the windowsill beside my chair. One is a silicon carbide stone that's not particularly coarse. But it will lay down an edge quick. I use it when I'm putting my angle on a new knife. Then I've got a typical Arkansas stone on a cedar base that is a general purpose stone. When I'm feeling motivated, I'll finish up an edge with an extra fine Arkansas stone that I've had for decades.