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The fact that your fingers didn't burn might be caused by the fact that you were holding the spine / tang and not touching the blade enar the edge.

When I grind away pitting on my low speed home...

about that warped wapi: You can sometimes fix this by clamping it in a vise with 2 pieces of wood at the toe and the heel on one side of the blade, and 1 piece of wood in the middle on the other side...