Camera Arm for Timelapse

I made this camera arm for 3D print timelapse videos. It's very strong to hold a camera and a circle light source together. You can install on it a standard 1/4 ball joint adapter.
Use 2x M4 screws and 2x M4 nuts to mount together with the desk mount.
To prevent slip on the desk, I used liquid rubber on the desk mount and on the screw protector.