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I have been using 1095 and cpm steels for the last while, and I have found that when working with a plain carbon steel that is 1/8" or less, that it is best to do all of the grinding after heat treat. The 1/8" is already so thin that it can be hard to keep it from warping. But at the same time when hardening some ats, 440c, or cpm steels I keep the edge at about .030" just to be sure. You can grind them to 90% finished and not have any problems at all. At least this has been my experience doing my own heat treating, and also if the stainless steel warps you have a few min to straighten them out before the hardness sets in. with carbon steel you have only a few moments to get it straight.
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