Design the required parts and cut them using a laser printer or if you're more crafty using a saw.
Screw the servo motors to the relative parts as you can see in the picture below and attach all parts.
The servos were all connected to the ServoDroid board.
An extension was used for the gripper servo wire
Finally just plug the ServoDroid board into your phone's audio jack using the cable and you can start controlling robot using the servo controller app.