While there are all sorts of ways to build a hot wire foam cutter, this design from [jasonwinfieldnz ... Check out the build video after the break. Still not portable enough for you?

Those stick-type hot wire cutters from the craft store that plug into the wall aren’t much better than a knife. The actual cleaving of foam is easier, but dragging a long, hot flexible wand ...

But it tends to cost more. You save $10 (14%) This effective portable heater works quickly and lasts for years. But its narrow stream of hot air doesn’t feel as comfortable as the heat from ...