ONLY FOR STATIC USE. IF MOUNTED ON HELMET, BIKE ETC AND THE FRAME OPENS, YOU WILL LOSE YOUR GOPRO. USE AT OWN RISK. This is a 3Dprinted frame i use with my GoPro Hero3 but i´m sure it fits 3+ and 4 aswell. It can easily be opened and closed using a simple snap lock design. It needs to be printed in a somewhat flexible for the concept to work I have printed it in nGen from colorFabb which works and a pre-release PetG from Proto-Pasta. If you successfully print one in other materials let me know. Video: https://youtu.be/qTEOTVw5Cv4