No problem with the caps and not taken wrong. I am using a jr8103 with 3servo 120degree ccpm, a jr 460t gyro with 8231 digital servo's and 8411sa for the tail rotor.The engine i am breaking in on the bench a webra 35 and a enya 35 heli. not sure which one I will install. The blades have been balanced for cg and static. I am in the northwest area of houston and fly at scobee field.