I had Vans ship the upper longerons with the fuselage ( not the wing kit ) . They were shipped in a 1 1/2 in. pvc pipe aprox 16 ft long . When I inventoried the kit I looked in the pvc and saw the angle alum, today when I pulled them out there were the two longerons but also three other sticks of angle . Looked at the plans ( looked not studied ) What are they for ? wing ?