Extremely good design. Could use a little tightening for the wing to keep them from saging, though come to think of it the real plane must have had the same wing sag on it as this dose. Also for those papper wings no sweat using those. Lego used that idea on the cow boy sets all the time. By the way to keep your wings from warping in the back make shure that when you fold or crease them that you do it as straite as you can, it will make them look a little more reallistic .