Mistermnkim - go with retract servos for the landing gear. A standard servo is not designed for operating retracts. I am using Hitec HS-75s. They are pretty inexpensive (about $30 each) you will need two. There are other brands, but they all do the same thing. Some are stronger but the expense goes up. The retract servo is designed to 180 degrees stop to stop. Its either on of off, with no set point adjustment. I also replaced the factory pushrods on the nose and main gear with 4-40 rod - no bending!