I want to add a third receiver , a nother HD ViP211, to my Dish Network system and am trying to decide the best action to take. Can I replace dual gun set up on my first dish with a quad and get rid of the second dish (Which I was told is for local channels and no longer needed). Or should I just put a DP34 switch in my existing set up to accomodate the third receiver. I was also told by a Dish Network rep that I would have to buy the third receiver, that it couldn't be added. See the enclosed diargam for my system set up and numbers.