I attempted to set the bevel using a slurry that I stirred up on the 4k with the dmt. And I have done hours with of laps more than what I just put in the video just didn't want it to drag on.

As to the pressure, I try to just balance the blade when doing anything other than setting the bevel. I have been trying to make it rest on the stone as lightly as possible whilst maintaining even watershed in front of the razor.

I will also see about a microscope, or maybe a jeweler's loop, would that work?