So It appears according to support, that my backup, never opened, booted or upgraded C4-, is too old to take the new platform, and support says too much has changed to get this never booted C4 running, so I'm looking to buy a -used, running- C4, to have as a backup to my existing other C4, which supports 50% of my current setup. I want the C4 to have a hot swap capable backup.
I don't need the nortek stick, just the hub, running a semi recent platform.
Also have lots of cool devices to trade, if you'd like, so PM me if interested.
EDIT- Huge heartfelt thanks to all who reached out to help. This community is incredible. HE users are top shelf !!