i'm using c36r standard servo. what i'm willing to do is when same pwm signals are send to each servo at the same time, 2 servo will rotate in opposite direction for example when 2ms pulse is send , 2 servo will rotate +90 degree while the other 2 rotate -90 degree. i've found a method that need a modification to be done in the servo - by switching the potentiometer connection (outer leg) and dc motor polarity. however i found that this modification is hardly can be done for c36r servo because the potentiometer and the dc motor legs is soldered directly to the circuit board. the modification might damage the servo. is there other method to solve this problem? thank sich for your reply