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Back-and-forth with a chain
10 July 2026: Reconstruction because the motor doesn't stay on the gear and some modifications for the switch and the chain. (free version). The full version of this video is 25 minutes longer. See also the blog.
1 May 2026: Start of a new model with old (1970s) parts (free version). The full version of this video is 25 minutes longer. See also the blog.