This replaces the screw-mounted hotend fan cover with one that is held by magnets, for a clean front face and easier access to the toolhead. Works with an unmodified toolhead.
Inspired by ModCables101's magnet mod.
Press the magnets into the new cover. Screw the M3x8 screws into the toolhead until they bottom out; the heads should protrude 4mm from the surface.