I understand your question and what I see sis that the ribs maintain profile, but because the aileron hinge line is skewed to the center line of the wing, the hinge line gets thicker vertically, as it heads towards the wing tip because the inner most point on the hinge line is situated where the airfoil is the thinnest ,...at the trailing edge and the outer most point of the hinge line is situated further forward in the airfoil, where the airfoil profile is thicker. the only way to eliminate this geometry, is the make the wing taper vertically from the inner most hinge point to the outer most hinge point this will produce a hinge line height that will be parallel but will result in an aileron that goes from following the airfoil profile at the inner most point to being almost a flat barn door type aileron at the outer most point. maybe not the best for lift or tip stall.