Tommy S.,

This was years ago in the mid 1980's. I seriously doubt that the Central Hobbies ends will flex enough to fatigue. (When I read that statement about not supporting the rod I instantly went back almost 20 years and saw that plane going in. I honestly didn't think about the stout stuff that Central Hobbies has.) Saying all of that in the ( ) if I were making a push rod much over 15 to 18 inches I would still support it somewhere close to the center. If you do have a harmonic it will raise hell with everything in the assembly and cause premature ware. We use those push rods because they are stiff and transmit exactly what we want without flax. If we then shake hell out of everything what's the point? We defeat our purpose.

Sam