No, this is not the name of Ang Lee's newest rock & roll kung fu blockbuster. I'm just wondering, because I'm planning on pulling the chassis of my Swart AST to swap the speaker, if I need to drain the caps first. Obviously, I'm not going to be purposefully poking about inside the chassis, but fumbles happen. I don't even know if I should rest it on the "open" side or the knob side. I was planning on pulling the tubes out, just so I don't accidentally knock one. I've changed speakers before, just never had to pull a chassis to do it. And, while my hair is curly, I'd rather not make it any frizzier. I'd rather be overly cautious than foolhardy. Thanks.