[Jim] over at Grass Roots Engineering wrote in to share a large 3D print he just finished ... is the biggest single part printed with a DIY 3D printer. The printer itself is based on the RepRap ...

[Hyna] has spent seven years working with electron microscopes and five years with 3D printers. Now the goal is to combine expertise from both realms into a metal 3D printer based on electron-beam ...