>>312861>impossible to sharpen, noI don't think you really see what I'm talking about. I took a terrible picture for you.
The ones on the top are concave, and yeah, they're easy to sharpen. The ones at the bottom alternate large concave ones with three small convex ones. How do you sharpen those small ones, not to mention, in between those small ones? Unless I have a very thin pyramid shaped rod, there's no way I can do that.