I don't think it gets used much in model aircraft, but there is usually some slight difference in the incidence between the left and right wing in some light general aviation aircraft to help counter torque reaction. In other words the right wing has slightly greater incidence than the left, which creates slightly greater lift on the right wing due to a greater angle of attack, which counters the plane's tendency to roll to the right. It is very slight, I think on the order of a degree or two.