Ben, I agree with many others that this has been an interesting and informative discussion. You have mentioned your dissatisfaction with DNG profiles in terms of accuracy. There are currently (at least) three ways to make custom DNG profiles. 1. Use the ColorChecker Passport software. This builds new profiles de novo (without requiring a "base profile"), but gives zero control over the TRC or anything else. (You can edit the app package and replace the CC spectral measurements with your own, but that's about it.) 2. Use the Adobe DNG Profile Editor. This software requires the use of a DNG "base profile" and it stacks adjustments on top of that in what is called a "recipe" file (in XMP), which can then be incorporated into a new (compiled) DNG profile. There is more control than with the ColorChecker software, but it is visually oriented, rather than "by the numbers." It is good for making "looks" but not colorimetrically accurate results. 3. Use dcpTool. (http://dcptool.sourceforge.net/Introduction.html) This command-line driven software can decompile binary format DNG profiles into XMP, compile XMP files into new compiled DNG profiles, make a profile "invariate" (an invariate profile won’t cause changes in tint when you make adjustments to exposure settings), and untwist a profile. (An invariate profile won’t change color when you adjust exposure settings, but still has hue twists embedded within it. Untwisting a profile removes all hue twists completely. See http://dcptool.sourceforge.net/Hue%20Twists.html) Do you have any experience with the latter? Is so, I'd be interested to hear what your experiences are. The same is true for anyone else out there, of course. Thanks, --Rich Wagner