I have what appear to be the original milling marks across the flat face of the gears (parallel straight line marks). I can't tell from the photo whether your marks are the same as mine or not; from the photo your marks appear to be cross-hatched, but it could just be the light reflection). The gears on mine don't seem to be rubbing.
You might check the spacing by applying a thin piece of transparent or other tape across the face of the gear while turning it to see if the tape is displaced or scratched, if you haven't already. It is a puzzlement...