NNo it is not, I bought this kit from Kerry Sterner and built it myself. also there is only 2 flights on the L-39, although built in the winter of 2009- 2010, just 2 flights on it last year and all went well. I have the same flap set up in another jet, I deploy the flaps a the same time as in all my jets, onlyy difference is the number on the servos, I picked up Hitec's 5645's today and tomorrow I will put them in the wings.