Airspeed indicator for flight simulator

This is a replica of an airspeed indicator. It is inspired by the airspeed indicator you can find in fighter jets but is not an exact replica. The speed range is adapted to the planes I usually fly in DCS World. 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 front plane.

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 (M3x20 mm) and four nuts (M3) to attach the front plane to the back plate.

Update :
The screw hole to attach the proximity sensor now runs through the back plate and has a recess to secure the sensor with a nut (Hu, M3). Use a M3x10 mm screw. There is also a hole to allow fine tuning of the proximity sensor without having to disassemble anything. I haven't use it so it might not work but thought it could be a good idea eventually.