In addition to his Thursday column, Duff McKagan is now answering reader questions throughout the week. Write to him at askduff@seattleweekly.com. Find all of Duff’s posts here.Q: I’ve been trying to get our bass player to get that ‘Duff’ sound, but it is pretty tough. What amp settings do you use? — LayoDuff: Ah, you thought could try and slip me up on this one to answer just like that?! I am a cagey warrior used to the Kung Fu that you thus deploy. And the answer is? Trade secret, biotch! Good luck!