The mount i use for my SJ1000 camera on my helmet, will need 5mm nuts and bolts and some of this - Black SJ3540 (250) 3M Dual Lock Tape (Amazon) to attach to helmet. I use it come rain or shine no problems.
I suggest that you hold the part on your helmet whilst still hot (heated bed) to get a good fit up.
Arm_3_pronged_mount.stl | 66.2KB | |
Camera_arm_mount.stl | 3.0MB | |
large_arm_2-2.stl | 43.8KB | |
small_arm_2-2.stl | 44.5KB |