Here is an updated version.
I have managed to reduce the green cast, reduce the magenta slightly and enhance the richness of the red as well as stretch the data a little further.
Star colours have improved slightly, but that will have to wait until I grab some shorter subs in RGB as Humi suggested.
Horse Head in Colour Version 2 - High Res
Hose Head in Colour Version 2 - Medium Res
Thanks for Looking!
Cheers
Mark