It's a fascinating object and that 17" of yours sure looks like it's delivering nice data. One question - looking closely at your original and updated versions, it seems as if the registration step has gone awry and there's a bit of a mismatch in the data before integrating. There's a nice small spiral and a lot of moderate brightness stars below and slightly left that appear to be repeated.
Either that or my eyes are really that bad...
cheers,
Andrew.
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