Is there a way I can rotate my left foot gear shifter clockwise and 2-4 degrees? There is a screw that tightins the shifter to a circular metal rod with teeth all around it and after you loosen the screw the shifter slides outward as if it will come off but it stops about half way, even if it could slide all the way off it did not look as if it would because the housing around it looked like it would stop it from coming all the way off. Any help would be appreciated.