Nice to meet a fellow pec minor syndrome patient! Although I got excited thinking you were going to reveal what your PT did for it that worked. LOL

Early on, I had similar symptoms regarding the arm numbness and 4th and 5th fingers. I did Egoscue from books religiously early on and the forearm and finger numbness was the first thing that subsided.

These days I'm doing PT and an eclectic mix of stretches and exercises from PT books and my PT. I've made enough progress, I don't think I'll need the surgery, but I'm also lucky that my symptomatic side is not my dominant hand.

Does your left shoulder sit lower than the right when you stand square in front of the mirror with your arms at your sides?

Do let us know how things go. We all benefit by sharing information.