Joe,

Since the Integral has composite stabs, Joey and I used the seam line as a reference. It was spot on for us. Sight down the side of the tip and line the seam line up on the stab and elevator. Alternatively (and probably the more accurate way, and the most repeatable way to do it, especially on airplanes that don't have composite flying surfaces) is to use an incidence meter. I reccomend the Hangar 9 Angle Pro meter, if you don't have one already.

There is nothing wrong with a highly scientific, and calculated "that looks about right". Believe it or not, the human eye is a pretty accurate tool- you just need to know how to use it.