Assembly using the 'all at once' mantra was very annoying.

The front and rear are now split into panels held together by screws.  This means you can assemble all the mechanical bits, and then assemble all the electrical bits.  The latter I'm shooting for four screw terminals and two ribbon cables.  Time will tell.

Mounting the Pi touchscreen needed a couple layers...

A whole new category of full stack developer.  :)