Well spotted - there were some clues in the "direct hit" image.
Maxim does seem to remove aeroplane trails better than IRIS, it has de-blooming - essential for my camera - see below. Plus it scales darks for flats. This is needed as the flats are up to 5 seconds exposures. I prefer IRIS for colour Canon images,
For those interested in imaging and image processing with DSLR, CCD, webcam or film.