so i've noticed i have some dark colored metal shaveings in the cabinet below the flipper coils. is this normal after lets say....1500 games? i didnt notice any under the top flipper, only the bottom two. at a quick glance i didnt see any metal on metal contact, but i'll look them over a little better when i get a chance. just wondering if i have some bad alignment or parts are too worn. is this normal after so many games? there isnt a ton but a good dusting.