what i really can,t figure out is, i have another model with the same receiver and same servos fitted and have never noticed any chattering but with this other model in question the chattering is a pain or a worry to me as it doesnt seem right. why do all servos chatter ? is it because one could be abit off and setting off the others ? as mentioned i have tried a different receiver / battery pack / switch. the only difference in servos between the two models is the chattering model does have extended servo leads for the rudder and elevator servos as there mounted in the very rear of the fuselage [ Katana 3D Model ]