I wanted a third hand that also included a circuit board clamp. The Lötgnu design for clamping circuit boards and cables struck me as a particularly elegant design. https://www.thingiverse.com/thing:378926

Combined with the similarly elegant collapsible third hand; https://www.thingiverse.com/thing:2322358

and you end up with my somewhat inelegant solution. (The baseplate for mine is not as nice as it could be. There are certainly cleaner ways to achieve this).

Baseplate is my design. Clamps are the same as the Lötgnu, and the threaded extensions for the third hands come from the Collapsible Third Hand.

This version has been modified slightly since I built mine to take some of the pressure off the clamps. If you have problems with it, let me know.

Another caveat, Clothes pegs in Australia have a slightly different size of spring. I had to tweak my springs a bit to get a good fit.