I've been out of the loop for awhile, but... If you want answers regarding carbon fiber, chances are forums won't give them. Take the time, call up a couple composites companies and ask them. Also keep in mind the really "high-end" carbon-fiber composites often use molds and extremely low pressure vacuums to form. Considering the expense of those procedures rules it out of the question for most of us, it's most likely going to be better to stick w/ the good ol' aluminum/steel. Once again though, find that out for yourself.