Thanks for looking all. I just love this object - so many hours years ago spent gazing at it with averted vision in my old 4.5" F10 Topic reflector, trying to imagine I could resolve some of the centre....
More data would be great, but it was getting very late (err early) on a "school nite" by then. I did mess for a while Greg trying to tone down the blue from the IDAS some more, but wasn't happy with the colour it left in the background. Probably gave up a bit too early on the processing. Perhaps a good excuse for a reprocess when/if I eventually get more data....