Nice job Jim. I was thinking you used the magnets to repel and lift the top when you turn the center. I see that's not how you designed it, but that might be something else to add to these style boxes.
I hate to admit this, but I tried to make something similar and could never get it to work the way it should. Struggled with the dovetail bit. I am not that experienced with a router. I use one, but not enough to be good at it. Maybe I should have removed as much waste as possible before I used the dovetail bit. 

.................. John D....................