Hi John,
You said that you had star movement when you used Blink with the 'raw' images - what about when you used Blink with your 'aligned' images, do you still see movement?
I will certainly admit that, on more than one occasion, I have processed the 'wrong' set of images during the calibration phase. With all the Flats, Darks, Biases and calibrated versions thereof, it can be quite easy to make a mistake. Perhaps revisit your process, and work back through the stages slowly and methodically (making good use of prefix and postfix options when avaiable, as well as careful selection of output directories).
My brain is now old and tired - so I am creating a 'cheat-sheet' that will guide me through the image acquisition phase (I made a simple mistake a few nights agp, and 'lost' 4 hours of 10-minute subs just because I had not set the TEC temperature correctly
), as well as through the pre-processing phase and the fundamental Crop/DBE/Colour Calibration steps that every master image needs at the start of post-processing. I also have used (for years now) a solid directory structure that keeps all the image data exactly where I need it to be for each and every object that I image. And, I am now using the "RegEx ReName" utility to get my source data collated in the way that is most meaningful to me.
Of course, not everybody will want all this 'hassle' - many just image, chuck their raw data at some calibration process that they are used to, and then throw a bunch of standard PixInsight processes at their master data to get a final image that they are happy with. I have described two extreme ends of the astro-imaging process, you will have to decide where 'you' want to fit in
