Thanks Everyone: I think it was age getting to the elevator and rudder servos. I removed the 2 elevator servos and the 1 rudder servo. Unplugged from the receiver and removed the servos and cables. At the coupling for the extensions, I had to remove the heat shrink that I had installed to keep them together, then unplugged the connections and cleaned them. Put them back together and used connector clips, reinstalled all the servos and everything works great. All-in-all, I think the connections were just dirty or maybe a little corroded.