Fast endless Bi-directional spiral with an ho scale train Powered by what appears to be seven HO-scale locomotives, Risner’s creation also works in reverse. Facebook Prev Article Next Article Machinery Checkout these cool gadgets... Related Posts Making a Cube in a Cube in a Cube from One Block of Metal is Impressive Big Marble Machine (1000 Marbles) Planting rice made easy Levitating Quantum Superconductors 100 Year Old Self-Playing Violin – “The Eighth Wonder Of the World” Laser + Welding + 3D Printer
