After a lot of testing, and direct dialogue with Eizo, we have discovered that some Eizo display models have a specific issue that affects calibration.
(This is a specific issue with some Eizo displays, and is not a LightSpace issue at all.)
We have discovered that some Eizo displays with the new 'Extended LUT' capability will NOT work correctly with YUV/YCrCb signal paths, and MUST be set to RGB.
The CG274X is definitely one model with this limitation, and we are waiting on Eizo for information on other models similarly limited.
If when attempting calibration the image shows 'strange' colour shift with a LUT active in YUV mode, the display is one with this issue.
Presently there is no workaround for this issue.
Mob Boss at Light Illusion