When I sold my i1LT to another U2410 user, I did this: - I left the i1LT on the screen for some hours (I wasn't home but I set the display to "burnin" mode). - I measured the patches with the i1LT - Right after it, I used the ColorMunki (which was acclimatized to the room temperature, somewhere around 21-23 celsius) to measure the patches. + I repeated the last two steps with a different observer. * I told him that he should warm up his instrument on the screen before he start measuring. -> So, he got a filter corrected i1LT with additional temperature related drift compensation. I hope he won't notice the green tinting of the H-IPS panel after the CIE standard observer calibration as I did. :) (I think he won't. It looks right until you have another display on the same desk with different gamut.) If ccmxmake would support ti3 input files, I would save the spectral data from the CM and the XYZ data from the Spyder, so I would be able to create correction matrices for any observers in the future. But my experience with non-1931_2 observers are not good. I couldn't use it with a WCG display where the gamut correction is based on the standard observer coordinated. So, it's useless for WCG displays. But I think you have a WCG displays because you want correction matrices for them. :)