Perhaps odd question - I remember reading a while back that you were choosing between RGB and CMYK for balancing. Would there be a way to balance to both, so that the colors are adjusted by 6 offset variables instead of 3?
The balancing is done in the RGB color space. Earlier I used the CMYK color space, because I erroneously assumed this was the relevant color space for film. It is possible to balance in multiple color spaces, but I haven’t really looked into this.