Orientation should be set properly, I printed this flat side down with tree supports enabled. 100% infill just for thickness and rigidity is also recommended.
I've done many night rides at this point with this model and myself or my friends haven't had issues.
If you are interested in the nut size to fit the hole on the end it's a M3, otherwise a ziptie would suffice.
I created this specifically to fit into the gopro mount on my Bell helmet but will work with any standard GoPro mount.
The author hasn't provided the model origin yet.