I replaced gas and impulse hose on my 028, removed the handle (4 screws) + top and side antivibe screws (learned later this was useless lol) but when finished I had a black screw left over that screws into plastic,,,I have looked everywhere and am puzzled,,anybody know where the black screws goes in an 028? The 3 anti vibe screws are bright, the handle screws are black.