The best Session Mount I've found remix for The Realacc 4 / Martian IV / Reverb Clone.
You can Add a strap on the front of the mount if you like.
The mount is invisible in Superview ^^
I had many many crashs with my Martian II and the same design, gopro is intact ^^
You can access the sd card, recharge and push all the buttons without have the get the session out, but you can also get it out without having to unscrew the mount.
I provide the 123dx file so feel free to make your own remiox or changes :-) <
Printed at 10 ms to avoid any fail, no support needed.