in the moment i have only the core/hybrid when he works fine, then i make the md´s with diskless boot.
The MD are equal by the diskless boot, you start a new untouched PC with network PXE-boot (show in your mainboard bios),
and the core dedect the new PC (it´s need time) and build an new MD and Orbiter for this device.
When the new MD it´s ready to work, than you loged in with from another PC with SSH to the new MD.
ssh with a putty, the then go with sudo -s (root) and install your vdr equal by the core/hybrid, this is my plan, maybe it´s going easy with another method?!
PS. I have see a script "update_ diskless_MD.sh" but i hav no time to check this script what he do!!!