Hmmm, thanks Rick.
I'm looking at it on my work monitor which is pretty good, not calibrated but it's a 2 week old HP Dreamcolour. There's definitely some green around the outside of the image but it's a fairly subtle green (kind of pale olive colour) which was intentional, but I'm not a fan of too much green in NB images either.
I did actually pull a bit of red out of the image right at the end as I felt the image had a bit of a magenta wash over it, perhaps I went too far