Good to hear it. Keep up the good posture. I see that you lie on your back with a towel under your spine....excellent. do your breathing exercises when you are down there. Also if you get brave turn thumbs up while there and then barely lift off ground...an inch or so and hold for a couple deep full breaths.

Also try childs pose in yoga. Breathing exercises are important. Pretend you are blowing bubbles. Or really get a bottle and blow bubbles. These may seem mambee bambee but they work on the area that is messed up. Shoulder shrugs and rolls are excellent to strengthen and correct your posture.

You were spot in when you said no aggressive stretches. That only makes it worse. Never go into the pain. This is not the injury to be all macho. You can touch the pain my PT says but don't go into. TOS is NOT a no pain no gain injury. You will pay dearly for pushing it.

Wow Bobby, Ultra marathons...I am impressed. I was never that hard core. I ran 2m every morning but now a briskly paced walk jars my arm too much. Folding laundry kicks my but these days. You must be so frustrated. I am sorry you have to go through this crud.

Good luck!