Will I be able to use my older receivers (HR10-250, DSR7000) with the new 5LNB dish? I'm going to have to move my dish to a roof mount, so I thought it might be worthwhile to just pick up a 5lnb dish and be done with it. However, I'm not ready to upgrade my receivers, etc., as they currently work just fine and I don't need my local HD channels (using OTA).