I am curious. Have you noticed in say, trot, on a circle, its easier or harder to keep the inside hip slightly forward of the outside hip, same with the inside shoulder? I mention this because I notice it myself; my weak left hip seems to shift too far backward thus letting my pelvis twist and the right butt/hip come too far forward (on left rein). My injury is a compressed disk, affecting the left leg and hip. As the injury has been healing, my leg position has improved. Posting with one stirrup out really exaggerates the un-evenness of my hips, especially in a circle!