Sorry Fred. You know how it is...you can do better. Look at the histogram dude. Black clipped in all channels.
For 9 hours lum, i feel certain you'd have nothing to hide so can't see the reasoning behind the clipping. I surprised you didn't notice as that's whats causing the dark magenta hue across the image - the green channel is clipped more than the red and blue (red+blue=purple). I'm not sure if you look at colour cards when you process. I find it helps as you can determine what colour interacts with what and more importantly determine ways to negate the colour shifts you dont want. They've good for neutralising backgrounds. If you use curves to boost the green channel, you see a much more aesthetic result. I think a repro is in order.