I received the new machine in the mail yesterday. It appears to work fine, busted screen notwithstanding. I will wait to set it up, though, until I get the replacement internal SSD. Once that happens, I can restore from my Time Machine backup, place the old machine’s drive in an enclosure and retain the ability to hop into FCP7 if I need to.
And a good thing too, because last night when I powered off the old machine, I couldn’t get anything to happen with it. Not even the usb peripheral would light up.
So, I’m waiting on a couple more components to arrive by mail but there shouldn’t be any issue getting things up and running how they were before!