Looks like a good working definition. It would be nice if posters to the new, expanded 3-Rail Scale Forum could refrain from using derogatory terms toward one or another aspect of someone else's modeling efforts, too. For example, some of us who have chosen to retain the standard 3-rail couplers don't appreciate them being referred to as "lobster claws." My layout has a point-to-point track plan. I certainly wouldn't refer to the well-designed and executed layouts of others as "loopy goopy roundy round the Christmas Tree" or some other equally disparaging term.
Hopefully by including the elements of powered and non-powered rolling equipment, scenery, operation, signalling, etc. we can have some good discussion on how all of these elements come together to form a 3-Rail Scale railroad. It's about a lot more than the couplers.