Ok, how about a way of determining difference in incidence without a meter.

Set the stab to 0 degrees. Set you plane on a table. Use a small level and place it on the stab (I hope that your plane's stab is flat). Use "stuff" under the tail to raise the tail until the stab is level. Cool, it's now at 0 degrees.

Measure the height of the center of the trailing edge (TE) of the wing from the table. Measure the height of the center of the leading edge (LE). What's the difference? What's the length of the wing's chord (distance from the LE to the TE)? I just measured the angle where the chord is 12" and the difference is 1/8" - the angle is 1.3 degrees.

If you give me the length of the chord and the difference in the height between the LE & TE I'll give ya the angle. I'm using a tool that lets me adjust the three points of a triangle and it will display the angle.

Yea, I'm being a butt head by using inches and there is a trigonometry formula to determine the angle.