This is a remix with some minor improvements over the original one at [https://www.thingiverse.com/thing:3158481](https://www.thingiverse.com/thing:3158481).  

The original arms had a cutout for a bolt inset.  This is a weak spot on the arm design as it causes a single layer to be printed between the notches and the bolt at each end.  I removed the bolt cutout from the arms to add strength back to the design.  You can double up on the knobs instead which would make it easier and more stable capable of handling heavier or larger and longer designs.

I found the design works using M5x30 bolts with M5 nuts if you want to go with metal versions.  I've included the knobs and base with built in nuts and bolts as well if you just want to print them.  Or you can print the individual nuts and bolts that I've provided in various shapes.

I've also included head plates for things like LED Strip lights, Webcams and a flat plate you can customize to suit what you need.

All of my articulating arm attachments and accessories are created to work with this design set.