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I mistyped. I meant 1k-8k jump. I lapped that thing for days on a 325 DMT then 220 grit sand paper and back to the DMT. A rough texture is not the same as a larger grit size though, and I'm convinced...

I started with a Norton 4/8 and it was awful. I'm convinced I must have gotten a defective one because the "4K" seems to be closer to 1k. Being my first stones I didn't know any better and found...