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 3D Printers Are Now Printing Houses, Yes, Houses! Kidswalker NT – An Operational Exoskeleton Mecha Robot You Can Buy For $21,000 Removing Rubber from Airport Runwas Is Satisfying to Watch The Most Complicated Watch Ever Created – $3m Woodturning the Eye – Craftsman of Wood Watch An Athletic Field Be Perfectly Created