Thanks Leonardo
Alex, what I will do for the remaining captures on this shot is keep the colour frames at 10 minutes and then do a heap more. The lum is ok but I will do some more yet, maybe another 16 to get another 25% more brightness. For future work on dim object (as this seems to be the only objects I am interested in at present) I am going to try 20 minutes on Lum and 10-15 minutes of colour. I take your point about processing too. Yes we do a lot of processing to make the image look "right", so star colour might as well be that too. It is the bloat that I am concerned with most.
Robin, you may well be right on the loss of colour issue, only time will tell if that is the case. If I use the strategy above though I think I might be able to sort this last remaining issue out.
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