We currently have two TSU600 in our live system setup, and two older unused TSU600s. The live systems use REV V BOOTREV D, and the unused have REV V BOOTREV A. Is there a simple process to change our older TSU's to our live REV V BOOTREV D... i.e. can I just upload/download the BOOTREV D from the "Chain-in" port? Do I need specific software... Will T-Watch Pro work? I saw the pin-out for the custom serial to RJ-45 in an older post.