You got it, Jim. It's good up to about 60°...perhaps a little higher, but can't go all the way to plan view. If you try to angle independent Face Me components, they start to corkscrew as you orbit the tree...very disconcerting.
There are 3 shadow casters in there to cope with longer shadows, but if you're happy enough to keep within a couple of hours either side of noon, you can delete the top and bottom ones. You'll only delete 2 faces but over half the edges in the model. Edges eat memory too.