The angle grinder plays a prominent role in the build, as do simple tools like a hand drill, files, and a welder — and yes, the unfinished lathe itself, which was used to bore out the bearing ...

A mill, a laser cutter, and a variety of hand tools all make appearances. There’s also plenty of CAD. Oh yeah, he uses a lathe, too. Initially, the clock ran a little fast. A longer pendulum was ...