I have an allegedly NOS 1987 C-Record RD to fit to my Record Carbonio project. The problem is that either the hanger bolt is too long or I'm missing some parts. As far as I can tell, the C-Record hanger mount is not a sprung pivot (I can't see where or how a spring would fit); all I have is a mounting bolt. Should there be a washer with a locating tab, for instance, or a circlip securing the bolt into the RD? If so, does anyone have an exploded parts diagram or a part number? If I just bolt the RD to the hanger it stays loose because the shoulder of the bolt emerges past the face of the RD.