Ian, a cutting edge with an integral chipbreaker allready exists is woodworking. You can get something like that for these super surfacers. Disposal blades grinded in a special way to povide a chipbreaking function, just like in metal working carbide inserts. That's still a long way of from handtools I guess, but who knows? Warren certainly wouldn't aprove, optimal surface quality needs finetuning of the chipbreaker.
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