These models are designed as replacement parts for the Zenmai-unit (clockwork unit). Both the dummy body and dummy shaft are my original creations. The dummy foot, adapted and resized to 75% of the original size from the SG90 Stack-chan model, includes some unique features. You can find this model in Shishikawa-san's repository at the following link: [https://github.com/meganetaaan/stack-chan/tree/dev/v1.0/case/case_SG90].