I am always prepared to wait, and waiting is no big deal for me. I just pull out my pad and a pen and start sketching, writing notes, or I do some concept work for something I'm working on.
I can loose myself in that 5" x 3 1/2" little paper pad for about an hour. So that's how long I would wait.
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( o< --!"Take that bass out you're voice, you talk to me in treble."
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