Hello all! just got done with a rough build of an Optimus Prime Helmet and i'll be linking to the PDO files and Pepakura Viewer for all to enjoy. I made this specifically for those going to cons/getting a jump on halloween this summer. Feel free to download and lemme know what you think! Pepakura Viewer Prime Head and for those of you that want a hard helmet (as opposed to glueing the template to cardboard) check out this Halo Armor Tutorial. You will need Cardstock and not regular paper Note: Pepakura Viewer will NOT work with Mac computers. If you do not have Windows Please contact me for a ZIP file containing the BMP files for the parts.