This is such a good example of fine Coot wing construction, that I used it to illustrate the Coot Construction Gallery overview.  Look closely to see that the vertical spuce stiffeners have

been glued in place.  These clamp rows reveal doubler caps glued onto the tops of the diagonal ribs, a tiny weight penalty for extra peace of mind when step-taxiing on windy lakes. Note there are no

fore-and-aft ribs here, as used by most Canadian and west-coast builders.