Airplane compass for flight simulator

This is a replica of a compass as you can find in every aircraft. It is designed to be used with a NEMA 17 stepper motor (like this one : https://amzn.eu/d/48ZMKHg) and with a digital sensor (like these : https://amzn.eu/d/fukfElb). The PDF is the background to be printed and glued to the turning disc.

I will use it connected to a stepper driver shield for an Arduino Uno. I plan on using it for DCS World through the use of DCS Bios.

To assemble the different parts you will need 5 M3 screws for the stepper motor (M3x5mm) and the digital sensor, 4 M3 screws (M3x10 mm) to attach the front plane to the spacers, 4 spacers (20 mm, M3) and four nuts (M3) to attch the spacers to the motor support.

Update : I have adjusted the backplate where the stepper is attached so the sensor can now be secured in position by a 10 mm M3 screw and a nut.

UPDATE V2:
Changed the design to ease the zeroing : in the original design the window is too small and sometimes the sensor doesn't see through