I have seen some threads where people have brought up the fact that the wing tube seems short but I can assure you my wings have porbably seen more stress than most. With 32oz of fuel my Katana weighed 14.5 pounds and I flew it no holds barred positive and negative G's with no problems (knock on wood). I have heard of more than one Creek Hobbies model "folding its wings" in flight but not the GSP model yet.