Currently have a 922 and 722k; have scheduled install for Hopper and 2 Joeys for this weekend. CSR thought that the off-air tuner is the same model for both the Hopper and the current DVRs, but is sending one in case different. Even if they are the same, those I have are about 2 years old. Do the newer tuners have any better sensitivity? I was planning to transfer some content to EHD from the 922 and load onto the Hopper, but she thought that the Hopper would reformat the drive. My understanding was that once an EHD was formatted by a DISH DVR, it could be used with any DISH DVR. Am certain that I have already done that when changing prior 722 for the 922, although lost a few recordings due to the initial problems with EHD functionality on the 922.