Hello Paul

I have no ideas on the bracing, but wanted to say welcome......from a fellow Bostonian (well, actually, I'm south shore.......Marshfield)

Are you sure that the PT is having you do work that is specifically for TOS ? I ask because my symptoms got much worse after completing 2 courses of PT with weights/etc. I finally found an excellent PT who has TOS herself and really "gets it."

Best of luck finding relief