I am the Dad in this case and If I go ahead and sheet the areas shown on my sons picture at the beginning I will use a template to mark and then cut down the wing ribs so that the sheeting will not add any thickness to the wing but will fit between the spars. If you look at the picture again you will see that I only intend to add sheeting on the first two bays on the top and the first bay only on the bottom (by bay I mean the opening in the wing present between the spars all the way along the wing). I felt this Mod would do two things for me. 1) It would make the Monocote look smoother along the front of the wing and 2) It would add strength to the wing although the strength probably is not required.