A vintage F-bracket, been used a lot and its time it moves on to other pastures.
Also a Chrosziel gear that is very clever. It slides on 15mm rods and tightens down now you can just stick your motor up against it and it saves the process of getting your motor even close to the lens in those tight situations.
Very handy and in great shape.
When I bought it, it was an $300-400. item.
Now since I haven't used it much lately thought I'd sell it for best offer.