I was curious if the SD 121 and the Dish 1000 were identical except for the lnb's and the metal bracket that points them and attaches them to the dish. I am considering swapping out the SD 121 lnb's with a Dish 1000 Lnb's. I currently have a SD 121 and a dish 500 pointed at 129. I don't care about the international channels, so I don't think I need the 121 anymore.