Just had Sky HD installed, would appreciate advice from you experienced users. The box is connected to a new Panasonic PX70 plasma. Two queries :- 1) The engineers connected it to the TV with both HDMI and Scart/RGB cables. Why both? I looked at the picture quality and it's better via HDMI, so why is the Scart connection required also? 2) Should I set output resolution on the Sky HD box to Automatic or 1080i? Initial impressions are that auto works best for standard def channels. Any input/advice appreciated.