Treadmills are pretty much plug-and-play devices for a bevy of fitness endeavors, but they can start to get out of whack over extended use — and we’re not talking about their part-time position as a ...

[Mike] had a bunch of disused fitness machines lying around. Being a skilled welder, he decided to take them apart and put them back together in the shape of a belt grinder. In particular, [Mike] is ...