2020 filament sensor bracket

This is a remix of https://www.thingiverse.com/thing:1357814 to hold the the SOVOL SV01 filament sensor without the spool holder.

I used this (https://www.thingiverse.com/thing:4144199) t-nut to attach bracket to the 2020 rail. If it's loose enough the bracket will slide freely along the rail and you can remove with a quarter turn of the nut.

I used an M3 threaded insert and M3 bolt to attach the original sensor to the bracket - but you can try an m4 bolt and lock-nut which will allow the sensor to swing around this axis.