I've been having a series of trouble with my Hurco MB3 vertical mill. First problem was "y" axis running away totally out of control. That was a scale problem. Reader head was shot. Now, because of my poor thinking and choosing not to document my every move in the diagnostic process, I'm totally confused. I have 3 servo amps. 3 servo motherboard cards and three linier scales. Two servo moters,"x"and "y" are identical. "Z" is bigger but cards and amps appear to be the same for all motors but are not interchangeable. How to I figure out what goes where?