Reverb columnist Duff McKagan has been around the block a few times. He’s played in a few bands (Loaded, Guns N’ Roses, Velvet Revolver) and studied business at Seattle U; he’s a voracious reader, a bassist, a married father of two, and he’s here to help.We’re going to try something new next week and let those of you who have been regular (or irregular, for that matter) consumers of Duff’s weekly columns a chance to ping him with a few queries. Like his column, the questions need not be music related. Need help tuning your guitar, finding a good book, or a present for your girlfriend? Ask Duff. Want to know where to get a bite to eat in Belltown at Midnight? Ask Duff.Send your queries, including the name you’d like to appear online (or in print) and your hometown to askduff@seattleweekly.com. Duff will pick a few questions to answer next week.