The expressions every day is school day" and "you never stop learning" seem particularly apt for me today. I have been struggling to stack a full H/A Sloar disc from yesterday.
I don't know why, but i wondered whether you could change the size of the "Image Stabilization Anchor" before analysing in AutoStakkert 3 .
A quick google and YES you can. Simply press CTRL as you would to move its position, but instead of clicking your image with the mouse, press any number between 1 & 9. 1 is the smallest size box, 9 the biggest. I have never thought of it before, might useful for Lunar stacking maybe.
Not really helped with my issue, but hopefully it will be of some use to somebody in the future.