Re: PC monitor calibration advice needed
The Xrite software is the only way to maintain a level of consistency with computer monitors. Video cards and driver updates will often mess up manual attempts to adjust thsoe same video cards manually.
You will not get fine precision with those controls.
If they really care, then they are putting a LUT on it first … external box. Short of wanting to spend that level of money … the ICC profiles are better than the manual method.