Thansk quick answer!! Yeah, I should just RTFM, for ref:
"Since the database has now been set up on the MySQL server, all you need to do for any additional devices is add the advancedsettings.xml file. You don't need to do any of the other steps, such as rescanning or reimporting. If it works on one device then it should work on all of them, as they are basically sharing the same "brain"."
So last question for me on this: for automatic library updates, I schedule this on only one machine, and that will populate the DB and the other clients just "know"?