I have had my 43HX70 for a few months now and would like to tweak it as much as possible. Will this help? About a month ago I performed the evil 9 point calibration. I remember reading that, once the 9 point is done, you can't do the zillion point because the 9 point causes some sort of distortion of the convergence grid. If so, how can I undo my 9 point cal?