Fortunately, I found a issue with my control linkages before I took my maiden flight. As you can see in the picture, I have ball links on each end of my control rods. Plus, I have Dubro Heavy Duty control horns. Well, it turns out that the control link connection on the Dubro Heavy Duty Control Horns swivel around the end of the 6-32 socket head screw. The ball link control rod ends allow them to swivel very easily (that's what they are supposed to do). Obviously, this swiveling action changes the total length of the control rod, thereby changing the control surface position. Boy am I glad I saw this before I took my maiden flight. This would have been a sure crash.

So, now I need another set of control horn clevis' that won't allow the control horn to swivel. Maybe just simple Great Planes 4-40 Steel Clevis.