I was trying to align the aerobar shifters today. There is a screw behind the shifter for loosening and tightening the shifter to the aerobar, which requires you to disassemble the shifter to get to. First I went and did the front shifter, that went ok without any problem. But I am having major problem with the rear shifter, which has some extra mechanicals for friction mode. Basically, I had it opened up, and now I can't put it back together again. The part that has the U ring on it, just won't go it and sit flush against the shifter itself. I tried it for an hour or so, and can't for the life of me, figure out how to put it back again.

Anyone has any idea or point me to some instruction on line, I will very much appreciate it. Thanks very much.