On my X-01, I've used both the orange wheel that came with the machine and now I'm using the ruby wheel. All of the wheels have runout on them and when turned my hand, you can see it wobble. Obviously once the machine spins the wheel up to its max RPM, you can't see the wobble. I'm pretty anal and feel from a machining standpoint, the wheels should be as close to true as possible and the runout that the machine has, bothers me. With that being said, the machine yields a nice grind and I am able to get even edges so I guess I have to just get over some things.