Hyperbolic regulation of origami folding degrees

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Hi all, On a central axial axle, I was able to create the form that could be folded by the rotational movement, but with the kangaroo in the core, I cannot control the degree of folding like the model I made with paper. The idea of how?

origami_twisting_problem_001.3dm (1.8 MB)

origami_twisting_problem_001.gh (122.3 KB)