I was recently given a Beseler MX II enlarger with a computer controlled color head. I have a manual for the enlarger, but not for the color head. So I finally got it put together okay (I think) and plug it in. I put a color transparency in and then started playing with the C,Y, and M dials. I noticed that when I would turn one of the dials, the readouts for at least two of the colors would change. At this point, I'm not sure how I can use this with VC black and white paper. How do I dial in magenta without the cyan or yellow also changing? Are there still manuals available for this particular color head?