" I thought I share the results of VR5 demo I did for a performance Honda builder today . The finish was the best i have ever found in the past . I was using a 0.0002" Chuck so I tested the repeatability . I tested it 3 times ,bluing the face and feeding so slightly, I Could hear no grinding . It wiped the bluing off completely all the way around. I know valve grinders need not be this perfect but the eyes of the customers were amazed ! He wrote me check and we loaded machine into truck. " Guys check out the finish and concern before you buy your next Valve Grinding Machine."