For a more secure connection, you might add a litte super glue in the holes for the Rasperry Pi.
Mounting holes position (rectangle): 725mm x 750mm
Mounting holes diameter: 5,5mm
Should print fine in common filaments like PLA, PETG from all manufacturers.
Print settings used for the examples:
Prusa MK4 with Enclosure
0,4mm Nozzle
0.2mm Layer height, 10% Infill
1.75mm Prusament PETG
The author marked this model as their own original creation.