I just got my .40 Stinger ARF and I am very pleased with the construction of it. To lock the wing halves together they use a diehydral brace with holes that lock in when you push the wing hold down dowels through it making a real tight connection. I was impressed with the covering job, and the hardware package which includes everything right down to the fuel tank and wheels. The only thing you need is some glue, everything else is there. Also the cowl is very nicely painted and it's not some flimsy thing either. I cant wait to get my new Super Tiger .40 on the nose of this baby.