Had a fun time with this one! Used a Creality CR-10 5S, printed the main body of the helmet without supports. Printed the back plate, dome side down, with supports. Did it at 105%...probably didn't need to make it that big. That said, I did not allow for the back plate to be taken off and on with magnets, so 105% barely allows me to put the helmet on and take it off...major ear bending...but I can do it. Wouldn't recommend attaching the back permanenlt for a 100% print (or smaller). Thanks for a great file!