Joseph Kritz -
Thanks! You've been a big help.
It all seems hit and miss. One machine may go one way; one another.
Called AppleCare (for what it's worth, but I paid when I bought all these machines) and they said go w/ the basic install - rhetorically - would they say anything else?
Since I've got nothing funky installed, and since all my machines are less than a year old with clean systems, I'm going to do the clone (obviously) in case there are issues, and do an install over what I have; if it screws, I'll roll back and then do the A&I. Knock on wood so to speak.
I'll post back if issues arise, and in that event, hopefully can also post a fix.