Hello, I am trying to see if I can use Dish 500 to poin EchoStar 9 at 121.0°W. I just got a DTV slimline 5 LNB dish and I think I need to point that to 101/110/119... Not sure though. I can leave Dish 500 to point to 110/119 if I can use DTV slimline to point to 121W and get international...