Neat!
That third one is a neat trick.
I edit an online publication that is supposed to look like a print publication. It's formatted in portrait, but sometimes there are tables that need to be put in in landscape. In a print publication, the headers on a page whose body is landscape would still be in the portrait position.
Getting Word to play nice when you're setting that up is not straightforward. I think you're solution of rotated text box that's associated with the header, but doesn't appear in the header space is brilliant and much easier than other methods I've used.