Ondrej Prusa, a 26-year old former DJ, has an enviable problem: his firm making three-dimensional printers is growing so fast he had to install a car-sized diesel generator to his downtown Prague plant to ease burden on the power network. Prusa became interested in printing in his DJ era when he needed to create sound controllers. He made adjustments to freely-available designs, and eventually set up his business. Prusa’s office is packed with colourful print […]