I recently purchased the Spyderco 302UF ultra-fine bench stone. For other 302UF owners, how flat is your stone? My stone has visible grinder swirl marks, which have become highlighted by swarf (see photo), but can't be felt by touch. If I lay a straight-edge across the stone in various places, I can see slight dips in the surface of the stone. My finest feeler gauge is .0015" and it won't fit under the straight-edge, so the surface varies by less than that. Which of the following best describes this stone?
1) Most 302UFs are not like this -- request a replacement.
2) All 302UFs are like this, and need further flattening.
3) All 302UFs are like this, don't worry about it.
4) This is as good as it gets with any stone, don't worry about it.
Thanks!
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