Its been bugging me I still have images to stack and check out from AF, but now I'm finding things I forgot I snapped! I do recall at the time thinking the time spent trying to image with a heavy barlow hanging out of the newt had been wasted, however median stacking often hides a multitude of sins....
I haven't imaged with a barlow much at all - its only a GSO ED barlow - surprised at how much I had to fight the green and blue down (almost like having a light pollution filter in). Flats with barlow in not taken, so all things considered pretty happy with this in the end.
10 x 5 mins ISO 800
Canon 450D, MPCC, 2" 2x barlow on 8 inch Newt (Heq5Pro)