I just began taking huntseat lessons and I am having some difficulty learning to post (or rise) on the correct diagonal. I understand the concept...I rise as the outside leg moves forward and return to the seat as the outside leg comes back. My instructor tells me to watch the outside shoulder, but that approach is not working for me. I would prefer to keep my head up (to keep my body in correct alignment) and "feel" the horse's outside leg move forward. Any advice?