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To us, the first version was hugely better. It showed lots of fine detail in the inner core of the galaxy. We'd suggest that instead of trying to smooth out the noise, you use a less curvy stretch, i.e. use a somewhat more linear stretch, not trying to bring out super-faint distant background galaxies, so the sky ends up much, much darker, but the gorgeous detail and colour that you have in the galaxy remains.
The only really good way to get super-faint distant galaxies against a grit-free sky is to do many nights worth of exposure.
Don't be discouraged: what you have is really, really good.
Best,
Mike
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