I just picked one of these up to start experimenting with some other stuff I have going on. Does yall's vibrate like it has runout in the barrel or roll pins? The motor got pretty hot, pretty quick as well. It looks like some of the vibration will be eliminated if I screw it into the bench. I just want to make sure this is indicative of other tumblers as well before I start punching holes in the base. if they all do it then that is fine. I just thought it would be smoother.