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Ok, thanks. Indeed, that's

Ok, thanks. Indeed, that's probably why I overlooked the dark / cdark business since I was already doing that on my own with the stacked (averaged) dark frames. However, I have yet to obtain somehow a similar white balancing.
On your opinion, would it still make sense to do my own averaged dark image subtraction (and no black / cblack business) and afterwards, apply the white balance coefficients "as shot"? The idea behind this is that subtracting a dark image (average or not) is, since I do the job "per channel", like a (x,y) dependent black and cblack subtraction, isn't it?