I have done this with my current zen set (~800ish chips) a year or so back. It's extremely boring but greatly improves slippery-ness. Here is a video where I take a barrel of the sanded chips and simulate a betting motion at increasing speeds. I don't have any "before" pics as comparisons, but I can tell you the barrel was exploding left and right even at the lowest speed I show here.So with a big set of Matsui Zens in my future, have people done any more of this? I have a sample of Matsui radisons I may try this on tomorrow