This is an improved version of the initial top mount I created.
In this version, the runout sensor is mounted in a way that aligns with the filament's top-down orientation.
The previous version considered a back-loaded filament, which was difficult to manage during filament changes.
I also noticed in the previous design that the spool tended to spin out of the holder, so I have added a small angle to the support, allowing the spool to always turn towards the holder base and not move out.