Do you mean arrow shaft push rods going from the servo to the control horn, or do you mean torque rods like those that operate the flaps and elevator on a Byrons?
If you mean push rods, I'd use epoxy, especially if the push rods are made of aluminum, carbon fiber, or fiberglass. Pro bond works great on wood and foam, I don't have any experience using it on any of the surfaces I mentioned above.