So today we moved the magnet up .5 cm closer to my forehead because my arm was moving at 120% in the previous position. Well that made me twitch even at 100% so we moved it an additional .5 cm, so 1 cm total and that was much better, got to 120% without any twitching and I didn't have any additional pain. So maybe this is the spot. I am hoping my pain will go away now! If not we'll be doing another MT hunt to reposition the chair and everything else.