I read the FAQ section and looks like it's not too hard to install the locals dish. I read the diagram and it's pretty easy. My question is, I have three lines coming off my phase III with intgrated switch, do I have to connect the forth one to the zinwell switch as well ? or can I just have three? Than one or two off my 72.5? I only have two rooms and only use two lines now. Thanks for the help. not sure how these switches work.