The Rudder is a different story. Two Servos - One Surface. The matchbox would be a help here but if you can center the servos and have complete servo throws without any binding, then in my opinion, it's not really necessary. I am using a "Y" on my rudder because I like have the other two mixes available for other things (JR8103) and I haven't had a bit of problem. The servos center nicely and not a bit of singing from them when in any part of the full range of motion.