It's not perfect but it's what I've got and it works.

Archive OpenRC
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It’s not perfect but it’s what I’ve got and it works. Polycarbonate spur gear and a M3x5,5mm screw.

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2c52e3f3dff443a3c3357ecb83a5d8e4.jpeg3840×2160 1.95 MB

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274005871a3bd206dd6ea6c93ff726a1.jpeg3840×2160 1.99 MB

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Fine detail.