I had a client (has finished RAAM 7 times) with the same type of symptoms. His were stemming from his back/rib cage, affecting his pelvis balance and leading to a functional change in leg length that was correctable.
Here's my advice, go get some serious soft tissue massage, focusing on the muscle around the hip. Talk to your PT about stretches for your hip and low back - I don't have time to explain these right now but here are some usual suspects:
Tensor fascia lata (TFL)
Quadtratus lumborum (QL)
Hip rotators
Iliocostalis lumborum
glutes and piriformis
Also, see if you can get you seat up a bit then adjust the for/aft position. Measure everything off of the shorter leg.
Then you have to start on the appropriate hip flexor strengthening. I'll try to post more about that later.
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