[Mike Schreiber]

Originally Posted by TAlholm

I'm experimenting with a method that may allow faster and safer rehab for people with arm or leg injuries or who recently had surgery. For safety of the user, I am staying away from tracking rotation.

I believe a string pot is just a normal pot with a torsion spring and string integrated (think internals of a badge holder). I've seen several teams make their own with badge holders or in one case a retractable dog leash.