Is This 3D Printed Third Arm Useful? Maybe?

Humans have two arms, and we do pretty good things with them. More is surely better, though, right? With that in mind, [Emily The Engineer] set out to make a third arm for popular YouTuber [This Old Tony], and our primary question is this: is it actually useful?


This is a companion discussion topic for the original entry at https://hackaday.com/2023/12/25/is-this-3d-printed-third-arm-useful-maybe/