I thought of a solution for mounting the go pro / sjcam action camera or other brand on a bicycle helmet with complex geometry. The file contains the top mount, the closing cap and 12 types of bases with different angles and shape samples to help identify the angle. It can be printed without support with the orientation attached in the image. I recommend printing with an outdoor-resistant material such as PETG, ABS or more resistant pla. Assembly can be done very easily with a plastic adhesive. I used plastic clamps to attach it to the helmet