This is not a perfect model but it is higher poly than many others, actually prints on a BL printer and fits my rather large 63cm circumference head.
I have added a support blocker similar to the Mandalorian helmets. This cuts down on inside supports to reduce printing time. I have also adjusted variable layer height and print settings to ensure a smooth looking dome. The result is nice compared to default settings.
I hope to fill in some gaps and add magnet slots for the mask to snap to the helmet. Enjoy!