I designed this basic mount for the CR-6 SE and Max to hold the BTT Smart Filament Sensor to the base where the stock filament sensor resides. This mount was designed to line up with the Micro Swiss dual gear extruder so may not line up well with other extruders since the Micro Swiss routes the filament on the other side of the stepper shaft. This does not replace the back plate of the BTT Smart Filament Sensor, but attaches to the two middle screw holes using the longer screws provided with the sensor. I then used a piece of PTFE connected directly between the sensor and extruder.