Neptune 3 Pro Filament Sensor Mount (with dust filter mount)

Consists of two parts - the base and the sensor mount. You can choose sensor mount with or without dust filter mount. The sensor has 3 degrees of freedom, which will allow you to print at any height without filament friction.

The base is mounted with standard spool holder bolts.
The holes in the sensor mount have a single layer of filler to avoid supports. Remove it with a screwdriver or simply push it through with a bolt.

For using second spool I printed Spool Holder Elegoo Neptune 3 / 4 Pro by nilson_fx. 
The sensor mount also allows you attach Filament Dust Filter by Haprog. Just print it as separate part and glue up.

Base and sensor mount without dust filter mount prints without support. For mount with dust filter, I recommend using supports as shown in the screenshot:

Also source file for Fusion 360 provided.