Rick - It was great to hear that the CMS on the Sony is working great. I was talking with a friend about this, and he brought up a good point - that just because it measures and dials in great at the RGBCYM reference points, that doesn't mean that it is tracking linearly. IOW what is going on inside the triangle may or may not be tracking properly. The JVC was known to have this issue.
Here's a way to get a rough idea if you are curious. If you performed your CMS calibration using 75% patterns, measure again with 100% patterns. And if you used 100% patterns to calibrate, measure with 75% patterns. Do the targets all still line up with reasonably close dE? If so that is a good sign.
The next thing to check is to measure at various saturation levels. I do not know this test that well so maybe someone else can chime in here. But the idea is to measure at 25%, 50%, 75% and 100% saturation for each color and the plot on the points on the chart should form straight lines and be evenly spaced.
I don't think we declare the CMS as fully functional and working properly until such tests validate the linear tracking.
Hey, you did seem a little disappointed that you had no significant flaw you could pick on for this pj - now here's your chance to test and find out.