Tonuino - Self Locking Box

My build for the TonuinoIt is my first attempt at 3D-Printing and I wanted to use as little screws as possible and no glue. For mounting the PCBs, I decided to use screws as I got impatient and wanted to start the print and build for my kids.The speaker is snapped on with the included 3D printed clips. Electronics:Followed the explanations with Arduino and DFPlayer Mini from the Tonuino manual. Opted for 3 button classic. I extended the build with an 18650 battery and charging module.USB Port is routed through to access the SD card. Meaning when connecting the box to a Computer using USB I can put the files directly on the SD card. Additional the device is recognized as a USB Sound Card. I won't show pictures of the electronics, as it is mounted on a cheap chinese breadboard so the build inside looks disgusting. I should do my own PCB but did not find the time so far. Parts not listed on the Tonuino Page:- Pimeroni Speaker 3" 4Ohm- On / Off Switch- 24mm arcade buttons- USB C Po