Meanwhile back in the shed.......
This evening I drilled the holes for the tweeter and the binding plate with a 2 ⅛" hole saw and cut out the holes for the woofers with the jigsaw. I then glued and screwed the entire box together before attaching all of the components to the box.
Okay, so I'll be the first to admit that it looks like crap, but it's an in-wall speaker that will be hidden in it's entirety by a grille.
I'm still working on options for the grille and hope to have an idea by tomorrow.