I needed to mount BTT smart filament sensor V2 to my Ender 5.
I designed a plate that goes over the old bracket where the extruder was mounted. (I upgraded a long time ago to Direct drive).
Plate: you may screw in 3 mm screws and it will tap the threads
L bracket fit over the frame and uses t nuts to mount to frame.
I added the Fusion 360 files. Go nuts
The author marked this model as their own original creation.