I took the data for this back in April over 4 nights, and have on played around with the processing off and on since then. The conditions were not good when I got this, so I think I can do better. NGC4945 is still in a reasonable position in the sky, so perhaps near the new moon this month, I might be able to get more data.
Astrobin link: https://astrob.in/oknc3p/B/
