Andrew,
Just to say as a rank and file amateur, just applied to GH3 footing that had been shot in neutral, contrast -3, saturation -5 and nr -3, so not your recommended settings. This was a dec late afternoon shot, so sunset ambience. And here we are, sunset light as warm as it was on sunday. Your tweak is a cool one. A bit convoluted to use on FCPX but that works and so much easier than using the color wheel.. Thanks!