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You can have smiling blades with a warp/twist to them too, got a few myself. They too can be honed with the proper stroke once you recognize the condition and that the blade is a smiler.

Yes, it...

Interesting vid and I got as far as having to cause excess hone wear to correct a warped/twisted blade. If you realize your blade has a warp/twist why not just adjust you stroke to accommodate it and...