Very good tool, but without English instructions. Written by a person whose native language is not English, therefore idioms and words do not translate well. Also, the runout zeroing instructions almost certainly leave out that you must loosen the socket head cap screw (SCS) in the shank just enough for the four opposing screws to bring the eccentricity ("concentricity") of the head to zero (DO NOT EXCEED TORQUE) . . (I had to call the factory to make sure I didn't damage the unit). According…