The only Carbon part I own are zero-rise, zero-bend (basically a carbon tube) Kestrel handlebar on my '84 Cannondale SM 600. I got it cheap at Trade Show long ago! On the last day of the shows, sometimes dealers/suppliers will sell some of their stuff "cheap" rather than haul it all back with them. You can't see the Kestrel logo in this pic; the shifters clamp over them. The bars actually came with plastic inserts for the ends to allow your Onza bar ends to not crush the bars.