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Possibly, though oval stars out in the corners is more likely to be just normal SCT coma showing up. There are a few in this round of data that resolved much more nicely into obvious doubles which before the collimation tweak were just blobs.
Regards the collimation, I really have to check it with the camera fitted or the benefit would be largely undone, if it did not have visible coma it would be harder to do but given it does (Just most of it is cropped out here) the easiest way I have yet found was to do it using the direction of the coma tails to sort it out. I used CCD inspector to check it afterwards but it was actually faster to do it by eye on looping frame and focus exposures.
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