PICAN-M HAT case PI 3B

This is a customization of the existing Raspberry PI 3B case for DIN rail mount, to add support for a specific HAT, used within different marine applications.

The supported HAT:
https://copperhilltech.com/pican-m-nmea-0183-nmea-2000-hat-for-raspberry-pi/

The following customization is done:

1. Make room for the HAT, about 15mm higher
2. Add a hole for the NMEA 2000 connection
3. Add a hole for the NMEA 0183 connection
4. Make it possible to screw the raspberry board from the outside with the supplied screw with the HAT
5. Use M4*40 to assemble the case, my local hardware store did not have longer M3, so I had to use M4

Note: Keep in mind that this is my first 3D print/model, it is far from perfect.