Adapter to mount a gopro on top of your dye i5 (maybe i4 too).
The pictured design is a little out of date, I rounded and smoothed out the whole model. 
You will need a short M4 screw along with a nut and a GoPro mounting screw and nut (M5).
Enjoy!

note: This is taken from my Thingiverse page, if needed I can prove it is my design.