This arm was made to support objects with a mass equal or higher than 1kg with an ajustable position.
In my case I reused an old phone/table holder and my objective was to support an old and heavy Samsung tablet to see movies/streams while I'm lying.
This arm weights less than 200g in PLA (it can vary with the definitions used in slicer).

Note: This arm is not the final version. The end arm is for my old support, anyway I provide the openscad (with some bugs and not totally optimized that I will try to correct) so you can change the purpose of the arm. I didnt't make the headers adaptable too, but I'll try to make them in the next version.

If you have any question please contact me!