Apparently I qualify for CBS-HD, but before activating it on my account E* failed to tell me I needed another dish on my roof. I was able to find out my current dish picks up 110 & 119, but I also need 61.5. My question is this since E* wants $100 to come install the dish for a single free channel; can I replace my dish with another that picks up all three birds? If so, will I need any switches? I currently have a 811 and a 522 in the house, don't plan on adding anymore, soon anyway...