@steemsilo
I am about 2 hours west of Kansas City.
Did you see a physical therapist about it? My dad had a rotator cuff injury a few years back. The surgeon wanted to do surgery (go figure). The physical therapist gave him some easy exercises that he did on the daily and he didn't need surgery after all. (I was so proud when he told me that!)

While I haven't watched all the videos on this channel: https://www.youtube.com/user/physicaltherapyvideo

these physical therapists are silly and informative. There might be something that can help you gain some more range-of-motion.

Take care!