This was the first build that I ever made and wanted to both wear and function. (https://www.youtube.com/watch?v=A8Z1hSAfKX8) The mask opens and closes utilizing servos and the lights turn on and off depending on when the mask is either open or closed. I had never tried anything even close to this. Let's just say it was a major learning process. I really did mess up the process and I am not completely happy with the final result but I did learn a lot. I would still recommend not increasing the size of the helmet too much but rather just carving out some of the material on the bottom so that you can fit your head inside. Once to get past the lip on the bottom, there should be plenty of room inside. You don't want to completely look even more like a bobble head. Thanks for the files! An awesome build!
Let me know if you have any questions!