I'm wanting to upgrade to HD. Right now i have a Dish 500 with a DPP Twin pointing at 110/119. As i understand HD channels are on 61.5 and 129. The 129 bird is out of the question due to trees. I have a clear LOS to the 61.5 bird. If i told CS of this situation,would the installer just install another dish (500 or 300) for 61.5 and feed the coax from it to the input on my DPP Twin?