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I agree the HHT is easier with the root outboard... Ironically on the shave test the cut is reversed :) Just an observation.

The bevel is certainly a big challenge.
Everything has limitations in the sense that sharpness tests cannot replace magnification & vice versa but as with the HHT any calibration or personalisation...

Clever concept but I wonder if it will work as you expect. If your increments are related to hones, 12k is not necessarily much sharper than the lower grits tho of course smoother.
Look forward to...