Current customer since the beginning of DISH. Looking to upgrade to Hopper with Sling and possibly 3 Joeys. I have a 722 and a 510D. CSR just told me that I cannot keep any non-Hopper receivers active in the same house (same dish) - is this correct or BS? Also, he told me that the technicians have "special equipment" (EHD?) and can transfer all recordings from the 722 AND the 510D. I know I can copy from 722 to my EHD but can it be done for the 510D? Thanks, Steve.