I tried the servos on the frame of the wings, and realized that they are unable to hold up just the wooden frames, without the servos. Thus, I ordered 2 servos with 13kg/cm Torque. These are stronger servos should be holding the wings up.
Also, the servos are moving slightly too fast for the wings. So with help from Prof Naga, I was able to include a new library that alter the speed of the wings. Since my Z-axis is a sweep on the servos, it doesn’t make sense. Prof Naga helped me too switch controls between 2 servos.