G'day Mike, glad to see you getting started with the 350, your gonna love it.
I downloaded the stacked 26meg pic, and then copied it then coverted it to jpg, as i couldn't process it as a tiff.
I used m$ digital image pro, adjusted brightness and contrast, levels and sharpened it a bit, cropped out the trees.
It's a great pic, i can't wait for you to start getting Milky Way shots
Here's my attempt at processing your pic.