Slow speed, drill motor with the standard worn bearing deal is magic for that...otherwise its time consuming decelerating and letting it bounce around to divot.
I actually tried that. Then I called Chad Spier and he said no divots. He says you want a burr to stand up, not a divot.
I should call him again, as I read some things yesterday about what I found on my junk when I pulled it apart I didn’t like. I was stumped. Now I think it was a smooth surface finish that caused the issue.
Everyone else said it was ring seal, but I knew it wasn’t.