My basic thought is nothing earthshaking: what works for you is all that is important, so unless our personal experience closely tracks with yours, our advice will only be guesswork. On the other hand, if your PT has the kind of experience and training necessary to correct your problem, then your PT's advice will count for much more than whatever we can suggest.

My only other thought: if at first you don't succeed, try something different until you succeed or exhaust the possibilities.

Good luck.