OK, here is a still of how the wings should be set up. Following that is a pic of foam materiel that came as packing. I have no clue what kind of plastic/foam this is. But it does not like torsion,(bend/twist) if installed in a "stacked" manner. The aft motor mount will tear, as there is no reinforcement. But, I hope, by using the packing material, I can defeat this problem.

Tim