[yakpilot]

Using a matchbox is usually quicker and easier, but if you want the servos to be in sync through their entire travel you have to program them. I've used matchboxs many times and they work well to set end points and centering, but often times you can't get the servos to match in the in-between points where they spend most of their time while in flight. Of course there are variables. If you've optimized the linkages and start off with servos that happen to match well then you are golden. But I've had servos the that were not matched very well from the factory, and once you start changing subtrims and endpoints by very much, you will get one servo that moves farther than the other for a given stick deflection. Anyways thats been my experience.