ceecrb1,

What you are doing may introduce errors, due to the airfoil.

What you need is to measure the throw deflections:

http://www3.towerhobbies.com/cgi-bin...?&I=LXET68&P=7

http://www3.towerhobbies.com/cgi-bin...?&I=LXK260&P=7

http://www.aero-works.net/store/sear...CategoryID=124

The simplest way to do it is taking relative measurements from a flat surface to the LE, TE and aileron or elevator TE.
As a bonus, that will identify also any warp of the wing or horizontal tail.
That is how full scale airplanes are aligned.