Once, long ago when magazines still existed, I bought a copy of Popular Mechanics. Inside was a guide on how to build a robotic lawnmower. Now this was back in the 1980s so it wasn’t a very complex ...

We’ve seen plenty of people 3D printing custom gears over the years, but [Mr Innovative] decided against an additive process for his bespoke component. He ended up using a simple CNC machine that ...