This is a sturdy camera arm, I have verified it with equipment up to 500g and it works great. Each joint is articulated and you can set the camera exactly where you need it. 

You can have just one arm or you can fit several, up to 3 works fine but after that it sways a bit to much to be good imo. 

Tapping threads
This print needs you to tap threads, M3, M8 and M10, check out the assembly instructions for where and for tips on how to do that. You could also press in heat set threads in brass if you want but the models are dimensioned to be tapped and it might be a bit tight for heat sets, if there is interest I can release models with clearance for heat sets.   

Some hardware is needed
M10 threaded rod, cut in whatever length you want your arms to be 
M8x40 hex head (DIN 933), one for each M8 knob (min 3)
M3x8 or 10 hex head (DIN 933), 2 pc, one for the table mount and one for the camera mount

The only special part that you need a 1/4" thumb screw for the camera, I bought this one for $2 but pretty much any one works. 
[https://www.aliexpress.com/item/1005007268881200.html](https://www.aliexpress.com/item/1005007268881200.html)

Assembly
See assembly instructions in the PDF.

Parts
To print a 2-arm system as in the picture you need:
2 M3 knobs
4 M8 knobs
2 Joint part A
2 Joint part B
1 Camera platform
1 Camera joint
1 Table joint
1 Table clamp
1 Table screw tip
1 Table screw cap

Printing tips
Print everything in PLA with 5 walls/top/bottom, 15% infill except the table clamp which is best to print in 100% infill, if you have some fancy PLA-CF or similar that will be great. Use supports where needed, no brims.