Thanks everyone for the replies back on my control rods. They are the stock kit rods, and are much stiffer than Sullivan Golden rods. I did do as kmeyers suggested, by holding the elevator and rudder to see if there was flexing with servo input. There was big time flexing. I added another brace and tested again, and there was no flexing. I could still do more by inserting a 4-40 rod into the inner pushrod hole on the servo end as far as I could go to help stiffen up even more. The control horns for rudder & elevator are the stock horns as supplied in the kit. It has never occured to me that they should be heavier duty.
Thanks again for spotting the weak spots in my build.
Lamar