So I'm begeister. With a little patience and effort can be achieved super results. The gradations in the grain are good. The grinding surface is ausreichent, even for large diameters. Unfortunately a dTon was chipped slightly in the supply, but that is only an optical defect. Dier grinding foot is stable. Ipum a veruteschen avoid in wet grinding, I always put a Zewa underneath. Otherwise fully satisfied. Oh yes-helpful is the video on Youtube, as is ground correctly.
