This is a gearbox cover for the Rev ION 2 Motor Drivetrain Gearbox - Through Bore to slightly protect the gears and protect things like hands and wires from getting chewed up by the gearbox. It attaches to the two free mounting holes on the NEO motors. To mount either disassemble the gearbox and place the cover on after everything except the outer plate. An easier way to mount is to slightly stretch the cover over the bottom spacers (it should sort of snap in place). Feel free to modify!
The author marked this model as their own original creation.