We do it all the time for pylon airplanes. Here is a site that both sells the parts and explains how to do it: [link=http://www.darrolcady.com/Carbon_Fiber/carbon_fiber.htm]Darrol Cady[/link]
Scott Hartman does a good job showing it in a couple of his build threads:
[link=http://www.nmpra.org/phpBB3/viewtopic.php?f=12&t=2710&start=10]Radio Installation[/link]
[link=http://www.rcuniverse.com/forum/m_10603350/mpage_4/tm.htm]post #78[/link]
I do mine the same basic way with a 1/8" OD (.093" ID) carbon rod, 2-56 (.093" Dia.) control rods, 1/8" ID aluminum tubing & JB weld. If you need a larger rod size, just take the control rod diameter, match it to the ID of the carbon rod, cap the ends with a matching piece of aluminum tubing and assemble it as shown in these examples.
Hope that helps some!
