I remixed this for my Martian II frame because i wanted full protection for the screen of my GoPro.
I use nd filters, so I don't want a lens protector built in.
If I don't use my filters I use this to protect the lens: https://www.thingiverse.com/thing:3675286
Print on it's side with support.
Share your make, I would love to see it!
Print on the side where the GoPro powerbutton would be.