Good working Raspberry 4 tablet

Based on this template with Raspi 4 in 3D printing:
http://www.stefanv.com/electronics/a-compact-home-made-raspberry-pi-tablet.html

Parts:
- Raspi 4 with heat sink set
- USB-C socket with cables (see photo, e.g. Ebay)
- simple USB-C and USB-A sockets for solder mounting
- Dislpay, e.g. https://www.berrybase.de/offizielles-raspberry-pi-7-display-mit-kapazitiven-touchscreen
- USB 2.0 sound card, e.g. https://www.berrybase.de/usb-2.0-soundkarte-mit-stereo-kopfhoerer-ausgang-und-mikrofon-eingang?c=354
- Powerbank module LX-LBC3.1 with USB-C >AND< USB-A socket. The version without USB-A does not work in this setting!!! (AliExpress or Amazon)
- Lion battery 3.7V / 10,000mah, 100 x 60 x 10-15mm
- Realtime clock if necessary, e.g. https://www.berrybase.de/ds3231-real-time-clock-modul-fuer-raspberry-pi. Preferably with larger button cell CR2032 (see photo).
- Spring from a ballpoint pen, 32mm length
- 6 screws M3 x 16mm, 6 nuts M3
- 4 pieces