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Mark,
I think the shadows in the first picture confused you. There are 8 distinct pieces there and the second picture shows one of the inner sectors being machined.
Regarding stiffness, remember that people make spiders out of piano wires too and you would not describe a piano wire as being stiff. More pictures will make it all clear, but now I have to wait for the FFC ribbon to arrive before I can start bonding tings together. Also there will be another four 3D printed sectors added to the eight shown in the first picture.
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