Okay, so I pulled a piece out from the green ceramic pyramids. Things seemed to be going okay, and thought I'd see if they had cut down the time needed on the buffing wheel. I can't say that it was a dramatic change, but it has improved. But there is finer media yet. I've yet to try starting with a rougher ceramic, rougher than green at least. But so far, seems to be paying off. Right now the machine is running with plastic beads that have some type of carborendum applied to them. Have to...