Really need some help here. Got the new short shifter and all instrictions are in Chinese or ??? Anyway, I need to (I think) take the original shifter handle apart. Does the top part of the shifter unscrew from the bottom? I have tried to take it apart but it just seems to twist at the bottom of the black handle just before the bottom ball part. I need the three hole flange gasket on top of the tower (I think).