[dnanian]

That mostly makes sense, jettrue. The only thing you don't have to do is the Option-boot: just choose the original startup disk using System Preferences' Startup Disk preference pane.

Also, when you restart to the original when things are hunky-dory, you need to install/update before you update the Safety Clone: otherwise, the Safety Clone will be updated with the original system (which is fine if you want to roll it back, but in this case you indicated all was well).

Finally, you probably don't need to name your backup "Macintosh HD" until you try to boot from it. I'm slightly concerned that, when you boot from the Safety Clone, the internal drive might show up after the external and the Safety Clone will point to the wrong volume. So, name it "Backup" for now, but rename if you want to test it (then, name it back to "Backup" when you're done testing).