When you have a need to match a pair of, or reverse a servo, the programmer is worth having hands down in my book. I have spent hours attempting to get the elevator servo's on my UCD 60 to work in unison with less than stellar results.

I finally gave in and got the programmer, made a degree wheel to check the center and endpoints of the pair of 5625's I was using and immediately found them to differ by a few degrees. Needless to say that was why I had so many issues when attempting to do the adjustment with the linkages and the radio programming. I simply matched the endpoints and center on the degree wheel, reversed one and installed them in the plane, absolutely perfect.

Enough said....

The short of it is, if you are using paired servos on any surface the programmer is a nice addition to your tool kit, if not save your cash for something else.