Hi Bo, you've managed some really nice detail from a 4 inch scope, the seeing must have been pretty good. I shot this object from Melbourne last week as well when we had a few rare cloudless nights. Mine was taken with a modded 550d through an 8 inch f5 Newtonian. I gave it only 30mins integration at 1600 iso, so it's not as bright as your one. You can view it
here and compare. Yours looks a bit pink but I'm sure that can be fixed. I used a UVIR cut filter and NB filter with mine because the modded camera shots often come out looking too red. Other than the colour, I reckon that shot's a real winner considering from where and with what it was taken with. Well done.