I've used the base and arms as-is. Added a pivot joint and clamp holder.

Recommended infill:

• Arms and base: 20%
• Pivot joint and clamp holder: 40%

All parts can be printed without support.

The hole for the clamp is intentionally thight. The best way to put the clamp in the holder is to heat it up. This way the plastic will melt a bit and secure the clamp.

All joints are connected using M5 bolts and nuts.