How do you do it? Jeff Berlin is a good example of a guy who sounds really, really fretless on his fretted. I've heard a local bassist who gets sweet fretless tones out of his fretted Warwick Corvette Pro 6-string. He even tried to explain it to me, much to no avail. Maybe I'm just dense. How do you guys get that smooth, fretless tone out of your fretted basses?