everything from tiny hand-held cutters to a hot-wire “table saw” for foam. We like the effort put into this one, though, and the possibilities it opens up. Thanks to [Keith O.] for the tip.

A foam cutter built like a coping saw but held parallel to the wire would offer much better control. [Techgenie]’s handheld hot wire foam cutter is a simple build based on a single 18650 and a ...