GoPro Handlebar Holder for 18mm handle
by uncovery, published
This is an easy model for 18mm handle diameter. It requires 4 screws & nuts to fix in place. Fits nicely on the gopro socket. Not to lose, not too tight.
Printed on Makerbot Replicator
Get polysoup.stl for the standard version.
Get V2 for a version where every nut has a fitting hole to secure the nut in place. This is a temp version. Tell me if it works for you.