It happened to me too..I got one of their trainers ..there is a fine line between a good flyer and a tank when it comes to airplanes...well built but a tank,,took the whole runway to get off the ground with a well run .40LA,,admittedly not a powerhouse but it did great in my tower trainer....the instructs...ha...had the cg 3mm from the leading edge..yes 3 mm...not the 3 inches it actually was...I think they are and have been improving, but personally am still wary...Rog