This is simple and easy to print rig for capture 3d content to watch on your 3d-tv or vr-headset.
All you need is two GoPro 3/3+/4 (pair must be the same model: 3 and 3 or 4 and 4 or 3+ and 3+)
video example is here (https://youtu.be/PYYktmBNb8w)
Designed in Blender
source file attached, there is a first version of rig hidden inside .blend file (with cameras stand side by side) but i not recommend that one: final version (with one upside down camera) give better results