Summary

This is a remix of Jace1969's Darth Vader head into a lego compatible head. He has lots of great models go check out his stuff. https://www.printables.com/social/80-jace1969

Make sure you turn on “detect thin walls” and "Extra perimeters if needed" as the helmet is pretty thin in places.

I am building a set of lego heads so that my kids can try playing Star Wars Legion using lego figures.
Here on Thingiverse
https://www.thingiverse.com/ifoulds/collections/lego-starwars-legion
reflected on Printable
https://www.printables.com/social/90982-ian-foulds/collections/394300