Here I discuss the mechanical/electrical alignment of the elbow joint.
SwanRobotics
https://youtu.be/PrKT_Mr0wTo
Cyber_One
https://youtu.be/Mljajffq-38
I've expanded my link to include every file I'm using to build my robot -- Ralph
https://drive.google.com/drive/folders/1wFcd9ezLthBs7f7v9rkNKwXQ3xYUN4ES?usp=sharing