Graeme, I'm going to ask the question but perhaps the answer is already in the documentation. When calibrating, while dispcal says it is iterating (1 to 16, 1 to 32, 1 to 64), first, could this information be captured in a text file somewhere? Seems this information gets overwritten by "About to optimize input curves and matrix ............................". Secondly, could additional measurement information be sent to the console during that process, over the base deltaE and measurement 32 of 64, say? I would love to see which RGB values are being sent to the display and what their measured chromaticities are. (Maybe that's an additional verbose level?) That way, for pedagogical purposes, I could observe the gradual construction of the 3D LUT and it would give me, and anyone using the software, a finer (deeper) technical understanding of what is going on. This idea, of course, is related to my previous post. But I thought it would be better to separate them. Roger