FUTURISTIC TECH on Instagram: "Building a fully functional marble clock sounds like a dream... until it becomes a test of absolute endurance. ⏳⚽ ​Between jammed tracks, failed 3D prints, and re-printing massive components, this project was a marathon. The maker spent countless hours hand-sanding parts just to get the physics perfectly right. ​Though he initially called it a "huge mistake" because of the sheer effort, seeing that mechanical lift and gravity circuit run smoothly makes it all worth