Q. My dad passed away, and I was cleaning his toolroom out. One of the strange tools I saved was a large L-shaped piece of flat metal that has ruler markings on it all over the place. I've been told ...

DEAR TIM: My dad passed away, and I was cleaning his tool room out. One of the tools I saved was a large L-shaped piece of flat metal that has ruler markings on it all over the place. I've been told ...

At this point, the internet is crawling with butt-kicking homebrew 3D printers made with extruded profiles, but it’s easy to underestimate the difficulty in getting there. Sure, most vendors sell a ...