I just got my first Fatboy from the Bay a few days ago. It was rather dingy looking in the one pic. It cleaned up fairly well. However, something isn't working right with the adjuster. The adjuster knob turns fine, clicks each number, moves up and down as it turns. But it's not moving the plate, or whatever you call it, up and down inside the head. Any ideas what's wrong? Any old threads regarding this issue that you could point me to? Thanks.