Reddish gray tones: profile tweak for Pro9000 Mk II?

Thanks, very interesting observations. I would have expected this from black, but I suspect that you might be right about the cyan.

Well, if I could tweak it, I could fix it so it looks perfect in tungsten light.  And actually, if I remove some magenta with adjustments in the printer driver, I can get gray tones that look very good kinds of light, at least to my eye. It's a compromise in that maybe it's not quite perfect in either type of light, but it's good enough to fool the eye.

So the question is how to tweak a profile to affect mainly gray tones but not other colors. Or actually, how to tweak a profile. I'm being lazy here. There's a lot of information (maybe too much) on profile tweaking, but I'm looking for suggestions.