Same, but for me the cure was John Sarno. Unfortunately RSI seems to be one of those disorders that everyone cures differently (if at all!) and you just have to stumble around until you find a method that works for you.
https://github.com/melling/ErgonomicNotes
Lots of people have tried many things.
This is the first I've heard of such a therapy, it sounds fascinating.
Anecdotally it's done nothing for my RSI, but it has helped me deal with a 7+ year "chronic" upper back pain, though it did take a bit of time to swallow the concept at first.