Hello, (I'm new here with no posts to my name so I couldn't start a new topic; "Secure your membership in this community by joining in the conversations"). My question is in regards to Grading SG250(NOT the Japanese). Does anyone have experience grading, cleaning, raising slurry on the SG250 with Nagura stones and if "yes", how does the SG250 "react" to the various grades?; 220, 1000, 4000, 6000 ... and so on. Thank you much