So I discovered something this morning and thought I'd put it out there for you guys as a challenge.

The thing to note is that these planes are not editable and have no parent relationships.

They are almost* equivalent to default planes.

* The minor difference is that we are allowed to flip normal

By the way this technique can also be used for other features.  You want a default axis?  No problem.

I can't imagine too many use cases, but thought you might enjoy the puzzle.

One extra clue/limitation..  It is not possible to rename them.