The full resolution shows fairly good detail, and overall a nice colour palette but I think you might want to remove the cyan present in the blue stars and some of the background.
I think it might also be worth looking at the cause of the misshapen stars. It appears you have a fair amount of tilt occurring in the bottom right hand corner with it becoming less on each adjacent corner and nearly none at all in the top left hand corner. This must be something to do with the connections between the camera and flattener. I am assuming that the flattener is screw threaded to the telescope? Sorting that problem will certainly make a huge difference to how the image looks.
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