Thanks Peter
I guess you could be right, I'm not choosing the most colour diverse targets! I tend to avoid nebulas because my camera is NABG but with deblooming in CCDStack perhaps that might change.
Good to hear you found CCDStack so good. Do you use many if the different registering algorithms, or data processing algorithms? In my limited time today I've found I've just stuck to the basic settings and wonder if I would get much from the other features.