Nice to see another shot at this, the only other one I've seen around is Damian Peach's which is predictably great yet out of reach of us mere mortals

Hence I'm pleased to see your take on it.
I presume you have done two stacks and combined them, one for the comet which would have moved significantly during 1.9 hours and one for the galaxy?
Nice colour balance.
My only suggestion would be to process such that the centre of NGC 1291 is less burnt out.