George “the Fat Man” Sanger is back with a new way to enhance your guitar sound. His Goodwill Amp Enhancer is a DIY version of the commercially available Enhancer, which beefs up the tone of open-back amps by redirecting the “lost” sound to the front. The nicely finished commercial versions start at $150 (http://www.soundenhancer.com), but the Fat Man built his enhancer out of a $15 computer desk he scavenged from a thrift shop. “It took just an hour or two,” he reports, “and adds wonderful tone to my amp.” In addition to reinforcing the sound, the Goodwill Amp Enhancer points the amp at your head, letting you hear yourself louder than, and before, your bandmates do. That helps you play better, and your bandmates don’t hate you for playing too loud.