Looking awesome. I like the angled edges you're doing on the top and the cheeks. I smoothed them out on mine, but they are looking awesome on yours.
Yeah, that 3d printer is great, I'm working on replacing the vents on the cheeks and ears now, since the earcups worked so awesomely, I want to do the forehead connector too, but that might be too difficult.
The funny thing about those printers, is they come with the bare necessities to operate, and they print the rest of their own parts, kind of "Robot domination" creepy...
What scale are you going with for the helmet?