Indeed, with the pressure setting I have now swarf builds up thinly and uniformly across the hone (biased to the side where the X stroke points) and is almost all easily removed just by rubbing with fingers alone.I find that the right amount of pressure tends to produce swarf that is easier to rinse off the stone and does not get as deeply embedded in the stone.
Indeed! There are a few things I can observe: bevel polish; edge under low magnification; edge straightness. I guess undercut is something about edge straightness and feedback from the stone is telling me about flatness of the bevel planes. If I have my technique down these signs should all kind of arrive at saying I'm done with the stone at around the same time. But right now I don't know that is yet the case so I will trust the things I can see with my eyes. I guess I will know I'm refining my technique successfully if the bevel scratches are removed at around the same time I start feeling friction on the stones.But don’t overthink feeling, or feedback, confirm what you feel on the stone