I am recently stuck on my project to develop a Smart Car with Activity Board. I built the car as indicated in pictures. I used servo port P12 and P13 for right and left high speed servos to drive wheels; and P14 and P15 to drive right and left encoders. In addition, I built a front servo to drive for the mounted PING))) at front, fed from servo port's regulated 5V. However my question is how can I set P16 and P17 on the servo ports to drive mounted PING))) and front servo? I looked in the 'abdrive.h' library and only find cal_encoderPins() and cal_servoPins() which are used only for the wheels and encoders.