The cranks are made from 8mm alloy plate. They follow the dimensions of the originals with the lower plate just having one position, which corresponds with the central hole (of 3) on the plastic Tamiya version. The rod screw holes are tapped at M3, and the upper clamping screw is the same size. The lower crank is threaded at M6 onto the vertical spindle (formerly a stainless steel cap screw) and has a lock nut and washer for clamping. Once the final positioning was set it then was finally drilled (at 5/64 = 1.9844mm) and pinned with a 2mm hardened steel pin (just visible on the right in the third pic). The upper crank is located on 4mm flats filed on the 6mm spindle, with a matching 6x4mm hole drilled and then filed to size through it.
The second one, for the rear of the truck, is almost done as well (one more crank to make), then it'll be black paint and fitment and testing.
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