reelay:

Without an incidence meter, the angles of a model can be measured with a ruler and a straight edge.

The one degree of incidence for your model is measured respect to the stabilizer.

As the picture shows, a straight edge over or under the stabilizer can be used as reference, regardless its width.

For one degree of incidence for 13-3/4" chord, the leading edge of the wing needs to be 0.23997” higher than the trailing edge, which is just a hair less than ¼” (exact ¼” represents 1.041 degrees).

Either for this method or for using an incidence meter, make sure that the stabilizer and the elevator are perfectly in line, as well as the wing and the aileron, if the portion of the wing you measure has ailerons; otherwise, any measurement will be off set.

Using some kind of support, align and fix the wing respect to the fuselage and tail before measuring, cutting and gluing the cabana struts.

Regards!