I'm trying to learn more about carbon fiber rods. Mostly I'm concerned about the tonal difference. I've heard they add sustain and brightness, but would that be at the expense of deep, clean low end? I'm more concerned with the tone issues than with stability. I originally posted a similar question in the basses forum, http://www.talkbass.com/forum/showthread.php?t=241735 then found out about this place. Thanks ddnidd1.