I also have a 3D printed helmet (old pictures) That I am still cleaning up.
Funny enough, in college my roommate had a 3D printer. (He was also a Star Wars fan) He decided to make a Mando helmet and asked me if I wanted to make one.
Fast forward a few years, what started out as just a helmet turned to a full kit. Lol.
I am in the process of completely striping and repainting. I couldn’t find a single accurate dented helmet. So I decided to make my own by heating up the pla then slowly molding it. I used a glass cup to help get an aggressive curve.
Another part of my kit that required some work was my Jetpack harness. Or what is Officially A $20 posture harness off Amazon. I’ve had the worst luck on things failing. So I riveted the connections. This is the most secure attachment I’ve found.