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Bill Tindall, E.Tn.
Present tool to wheel with bevel tangent to the wheel surface and then push with enough pressure to deform/dent the spinning wheel. I think the shape of the "dent" in the wheel abrades the correct profile.

This technique seems similar to the "slack belt" the knife people used to abrade a similar but larger profile they call the convex edge. In this case the shape of the belt assumed by the edge pushing into the slack belt grinds the correct profile like the trailing edge of an airplane wing.

Success is a tiny shiny reflection across the edge, about the thickness of a piece of paper.

I think a convex edge is going to strengthen the tip to resist lateral deflection, while at the same time provide more lateral force on the wood fracturing to lessen the force on the tip.

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