Forgive me if this has been asked before...If I choose to get a 1 Hopper 3 Joey system and 6 months down the road decide it would be more beneficial to have a 2 Hopper 2 Joey system, would I just call Dish and tell them I want to exchange a Joey for a Hopper and they send me the Hopper and I just plug in and attach the coax OR would I need a tech to come out and run cables and such. We have 4 TV's fed by a 722k and a 625. I am trying to determine if I should get a 2 Hopper/2 Joey system or get a 1 Hopper/3 Joey and "upgrade" to an additional Hopper later if I need it.