How are you running the servos, are they on a "Y" or mixed in the radio? What do you mean by correct end points, and astray?

Matchbox has the same basic controls that you would have in a radio, i.e. normal/reverse, endpoint and subtrim. If you are using 2 channels to drive your elevator servos and can't fix the problem via the radio, a matchbox won't help. If you are using a “Y”, the match box may help, depending upon what you mean by “astray.” It will not fix an differential movement issue between surfaces that is often seen when servo pots aren’t equal or the linkage geometry is not identical .