I thought that these types of rods were supposed to be better because the DIDN"T flex as much. Is this not true?

MinnFlyer, Yes that helps. So basically the wood rod is only attached to the metal, and the metal rods are only attached to the control horns and servo arms. Is that correct? If so, I would think that you would want to keep the metal as short as possible.

Leroifort, do you know where I can see examples of fiberglass or carbon rods?