I did not. There's a good chance that when the installer arrives tomorrow morning he is going to have a second dish and no DPH42 switch. That is what the person I talked to at Dish thought. If so, that's fine. I don't have a need to access one H3 from the other one. If I see a need I'll purchase the switch after the install and swap it out myself down the road. I had such a run around from Dish and from two local installers that I just want to get the two H3's in and activated.
Even with two dishes, your Hopper's and Joey's should all see each other as long as their is a MOCA, WiFI or Ethernet connection between them.