I am not following...
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In this design, the gear axes stay at a constant distance from each other. I am thinking that the drive string can actually hold the two halves together. I don't think we need the normal double lamina stuff. I will see if I can print some up tonight. If they turn out good enough, I may use them for Beta Simpson.
Image may be NSFW.
Clik here to view.

In this design, the gear axes stay at a constant distance from each other. I am thinking that the drive string can actually hold the two halves together. I don't think we need the normal double lamina stuff. I will see if I can print some up tonight. If they turn out good enough, I may use them for Beta Simpson.