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learning has occurred today. I try to push the limits on edge geometry in order to see how thin I can bring an edge on a given steel. For years I took S90V to ~.007-.010 BTE post HT. Decided to try taking a large radius hollow grind S90V blade to less than .005. I did it, but the edge stability was terrible (hitting bamboo and press cutting hard wood dowel.), so backed it off to .007. I think with S90V at 61-62 HRC, .007 is as thin as I am willing to go.
 
Needed a hollowgrind hand sanding jig and did not want to order one. Had a piece of thick aluminum laying around so I have 10”, 14”, and FFG all in one. (Don't know how durable it will be but simple and quick enough to remake if need be).
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