!!! Warning, Warning, There is a very high probability that you can break the wires going to the filament sensor if not extremelly carefull while moving the sensor. Take your time, do not force anything. You have been Warned!!!
An infeed roller only able to be used if you perform the modification of moving the filament run out sensor back to be on the rear two mounts. there are two main bodies, the ptfee body has recess to accept ptfe that goes into the sensor housing. This requires drilling an 5/32 or 3.8 mm hole following the feed hole in the sensor.
the other needs no ptfe and just guides into the stock sensor housing. both are retained with a single 3mm screw that just drops thru the roller to keep it positioned.
AIO Robotics PLA
Support is not necessarily needed, but will make under side flatter if your briding settings are not dialed in.