Roman,
I know this is not a how to forum, but I would appreciate if I can ask two questions, and then I will stop.
Do you flatten the image each time you are moving from one color space to another? I find shifts occur if I do not do so.
Also - how do you avoid posturization? Several times I have been doing my thing; you know .. fiddle here ... fiddle there... and then I notice certain colors in a certain area have been posturized and since I have been flattening between color spaces I need to start all over.
I think the term I mean is posturized.. I get funny edges between colors.
Does this question make sense?
Dave