Ender 3/Pro/V2 Bigtreetech smart filament sensor adapter. After the direct drive update I couldn't find any good solution for the sensor location. This works perfect for me. And don't have to do any changes to the stoke spool holder.

Note: Make sure to change the sensor triger distance. (M412 S1 D). I have it set to 100mm. Don't forget to save your setting on Epromt (M500).

Thank you