Someone at the Keohi HDTV stated that doing the 9 pt. convergence via the user menu(NOT service), on Toshiba HX81 sets causes hourglass shaped distortions needing professional calibration to correct. Of course, since I got my set on Friday, I've done this about 6 times. Opinions? Though I do plan on an ISF calibration, this is causing me to worry excessively in the meantime. Thanks for any input.