Thank you so much Do3d for allowing me to gain a wonderful experience in 3D printing the helmet and making it work!. bellow you will find details of how I printed my helmet. You'll find a link below to the YouTube tutorial and review of how I printed and motorised the helmet: Instagram Link: https://www.instagram.com/thehlshow/?hl=en Instagram: @thehlshow Link to the hinges file: www.thingiverse.comServo Hinge for Iron Man Helmet by ByteSlingerThis is a servo hinge setup for use with MIPRESIDENT's Iron Man Mark III helmet (http://www.thingiverse.com/thing:260152). You can see my final build here: http://www.thingiverse.com/make:286759 And a video of it in use here: https://youtu.be/q4N2HxEN5ng You can follow me as I print and build the full suit on my channel here: https://youtu.be/aBibldoc0sg This hinge setup requires no modification of the existing model and doesn't involve drilling/screwing through the sides. You will need to print: 1x Face Mount 1x Flat Top 1x Hinge Arm 1x Hinge Brackets 1x Second Hinge 1x Second Hinge Mount 1x Servo Mounts 2x Small Arms 1x Hinge Limiter (Optional) 1/2x Small Arm V2 (Optional) For this you will also require: 1x MG995 servo 1x servo micro controller (eg. Arduino Nano) 11x M4x10 Bolts 7/14 M4 Washers Extreme hold adhesive (Loctite 401 is an ideal adhesive for plastic to plastic, including PLA) I hope you enjoy printing and using my design. To help me keep designing and uploading more things, as well as continue to run my YouTube channel (http://www.youtube.com/c/3drevolution), please consider making a small donation to me via PayPal: http://www.paypal.me/JoshForwood Thank you! I used the the MG996R Metal Gear High Speed Torque servo to motorise the servo also the Thingiverse file is designed around this servo so it fits perfectly. I hope this was helpful and please if you have any question do not hesitate to ask me!