Hello, I am looking to create a simple device with two semi-independent pendulums. I created a Google Doc with a rough overview (forgive the janky drawings): https://docs.google.com/document/d/1j44wmI84Odi-nf3Oc4ymygjO1y7X1vXWiUhHgPOdFlk/edit# I'm wondering how to design and build the top axis to support the semi-independent motion of the pendulums. Is there an existing mechanical engineering concept that supports this kind of thing? Where should I go to learn how to design and construct a prototype? What materials would you recommend? Sorry, total noob. I took a SolidWorks class in high school many years ago, but haven't thought about mechanical design for a while. Thanks!