Thanks for sharing your thoughts. After I’m back from vacay I hope that I can give your plan a spin and share some thoughts of what I think about it. I like what you’ve done so far.
If I can share an insight for creating rotational hinge that works very smoothly, here’s a shot of the rotational structure of a twist-lock box I did. The negative area (at far right of my screen shot) can be “x-keyed” to make it even more sturdy and then that circular piece of wood, with some beeswax rubbed/burnished around the perimeter, becomes a very smooth and stable at articulating. The kerf’d out difference is just enough space needed so that it moves freely, yet stays secure, compared to a “rectangle in a circle” hinge approach.
