Useless Box - simple SG90

2022-10-19 NOTE: After months of use I've noticed the M2 servo-screw starts to spin free in the arm. I intend to heat-inset an M2 standoff NUT into the arm. That should solve the spin. I'll update with photos and notes when complete, but wanted to get this message out there immediately. I absolutely love the useless box!
Thanks!

update 2022-02-13: new "BetterBox"
Created the new "BetterBox" which prints without a battery holder. Instead, simply use this AAA Battery Holder. (Dimensions of Battery Holder for AAA: 2.082" x 0.948" x 0.516"/5.29cm x 2.41cm x 1.31cm(L*W*H)) Why? Because reliable 3v power is important for this project and my paperclip diy battery concept just wasn't working well enough.

You'll now see 2 stl files for the main box:
Version 01: ub-box.stl - printed with battery holder for use w/ diy paperclip conductors (not great) and 2.5mm lid-holes, which are too loose for Mx2mm screws. Please ignore ub-box.stl for now.
Version 02: ub-BetterBox.stl - for use