Trying to improve my PA resulted in taking a few test shots. It seems that I can get 30 secs now which is still pretty bad, but useable.
NGC 4945 was near were I was testing so I took a few quick subs and they looked quite yuk and noisy at ISO 8000 but they cleaned up surprisingly well after stacking 20. Always amazes me what you can find if you keep digging!
8" f5 newt, Sony a5100, 20x 30 second subs at ISO 8000.
Astrobin link Here.
Thanks for looking!
Cheers
Jo