
So far, these are the parts I am going to use:
- Raspberry Pi Zero
- GB Shell (+Hinges)
- ILI9341 2.8" Display
- 4 Port USB Hub
- External USB card
- Li-Ion Batter Charger

I designed and 3D printed a bigger well to include all buttons. Still needs painting and some finishing touches, but I generally like it. If anyone is interested, I can share the .stl for the well / buttons.
Next step is to trim down the display (the PCB is a tiny bit too wide) and fit it into the top part.