Backup, upgrade, then reverse backup

[dnanian]

That's interesting: it certainly should show up in the Finder (we do this all the time).

We automatically name the drive "Macintosh HD 1", even though it's called "Macintosh HD", to help you keep track of it. And, since SuperDuper! won't let you choose the boot drive as the destination, you can properly select the one you want to back up to as well.

If you want to back up from OWC -> Macintosh HD, that's fine. Just make certain that you've disconnected the external drive when you boot for the first time: if the aliases can't resolve to the old ("OWC") location they should try to resolve to the current drive, and all will likely be well.