I managed to setup and forget the scope for 3 nights up at the parents place in the Blue Mountains over Christmas. Got 5 hours on the Tarantula, 1.5 hours on the Horsehead and just 50 minutes on the Rosette due to some last night Gremlins (mostly me being a newb I think). I'm suprised with how much I got out of the Horsehead from my Dad's unmodded 200D!
All 5 minute subs at iso 400 on an unmodded 200D and WO Star 71.