Zac Builds acquired a tattered old iMac G3 from the 1990s, one of those legendary all-in-one PCs that dominated every desk. The device resembled a brick, thanks to its clunky old CRT screen, and inside was a jumble of yellowed plastic that crumbled to the touch and antique components that had been collecting dust for years. Instead of throwing it away, Zac recognized an opportunity to give this old girl new life. He gathered his equipment, which included a 3D scanner and printer, a soldering iron, and a custom-built fume extractor dubbed the Zacuum, and set to work, stripping it down to its bare elements.