Ok...Here is my situation. I have 3 HD HR21 recievers in 3 different rooms all with dual tuners of course. I was thinking that instead of running 2 wires to each room that I could use a switch in each room instead. I'm not sure if this is possible or not as I am new to Directv and am trying to figure everything out. Please excuse my ignorance. I'd rather not run 2 wires to every room. Is there a way to accomplish this and have both tuners work? What switch would I buy? THANKS IN ADVANCE!!