Hey, don't forget that 8417 digital servo can make interferences with PCM receiver too,horizon says that you can use with 5000t but CurtisYoungblood(JR pilot)says another thing,, during the flight nothing happen,,,this case happen happen when I'm closen to the helicopter,,,, I don't know what happened with my 5000t but since 5 flights ago,my gyro has been fighting with the tail,,,the gyro was so good and happened this,,,,any ideias???