[Shiraz (Ray)]

Thanks Glen. I am using driver ....5. I have no idea what firmware, but whatever it is, it is working fine.

would be good to compare darks - Astobin shared would be best.

I have 3 of those stuck-on pixels - easily dealt with (eg a hot pixel map, dither + rejection). Also, at high gain, there is a small number of transitory hot pixels that appear on only a few frames in a run - looking at a sequence of darks at high stretch, these pixels turn on and off and are present on maybe 1/3 of the frames typically. They cannot be removed from lights with conventional dark processing, because their average in the master dark is less than the value in any of the lights where they are switched on. Hot pixel mapping is needed to manage these if you really want to do a full calibration. They only have low signal levels and I prefer to use dither plus average stacking with rejection to completely remove them. Come to think of it, they behave like regular cosmic ray hits, but they are associated with particular pixels (or pixel pairs occasionally).