Thanks!
And beyond the fact that I cannot boot from the volume, and as a consequence the longer time it would take to restore service, there are no huge disadvantages in simply restoring the volume from the backup running the destination client off an OSX system disc as per the instructions on p.27 of the manual, right?:
"Restoring when you can’t start up from your backup
If you have a backup image or volume, but can’t start up from it, you can
still restore using your OS X install disc. To do so:
• Start up from the OS X Install disc.
• When the Installer starts, choose “Disk Utility” from its Application
menu.
• Once the Disk Utility starts, select the drive you want to restore to,
and switch to the Restore tab"
.