So here it is...my piece de resistance. I'm bitterly disappointed at my Ha Carina data, so much so that I didn't even bother deringing the stars. I did a 2x2 pano consisting of about 20 hours' worth of Ha data only to find, when I put it together... that SGP decided on its own to interpret the pano at right angles to what it was supposed to. Hence the unusable, weird cross shape. I also did this for R,G and B as well! It was supposed to be my first serious attempt at a pano, shot over several weeks and well over a hundred hours' worth of data. I'm so stupid to have not noticed it well before I completed it!
Does anyone have any tips for me to not have this happen again (apart from getting a square sensor...the 16803's a bit out of my price range right about now!)
https://imgur.com/a/TahVjNi