Tech Upgrades is for anyone who's ever wished they could build their own touchscreen, brew up and use conductive ink, rig a mouse that you can operate with your feet, or make a rad engraved computer tower that glows in the dark--essentially, it's for fun-loving nerds everywhere. Used to be, whenever you had a computer problem or techie glitch, you went and found the nearest geek to help fix it. But now, there's a new movement afoot--a band of inventive...