Decided to call it done on this one after 19hrs.
I feel like there's
probably a nicer looking image to be had if I didn't push the faint dust so hard, but that faint stuff makes the field more interesting, if less aesthetically pleasing.
Anyway, I don't think this is the nicest looking image I've produced, but it's a reasonable effort on an interesting target.
Small version with more capture details
here
Big version
here (recommended)
Full version
here (not really worth it)