Useless Box

This useless machine is inspiration from https://www.thingiverse.com/thing:1258082
I wanted to learn to CAD mechanical parts that fit together, with some microcontroller involved. I redid almost all the parts from previous build but tweaked them to suit my needs. it turned out great. I also used snug fit hex m3 nuts and bolts.
The original build used a spring. I used two small m3 screws for the hatch, and a rubber band to tension the hatch.

Here is the video of it in operation:
https://youtu.be/0K4xUlRV9QA

You can leave a comment, or email me at [email protected] if you need help in building this.

I used an Arduino MINI, A servo Motor 9g, a SPDT switch.
The SPDT comm pin is connect to GND. The other end is connected to Arduino Minis GPIO 4.
The servo is connected to GPIO 9 of Arduino.