Oh, my apologies. I am using different stacking software (DSS was having horrible trouble with my calibration frames). So I moved to ASTAP a few days ago, and it's superb. One of the only real problems with it is that it didn't align frames for composition -- it can merge three separate frames into a single RGB FITS, but that's not useful for StarTools. I say it "didn't" because two days ago I explained this to the developer, and yesterday he produced a version which can now align frames
I'll run them through the alignment routine and re-upload.
-simon