What I have heard, have been failures, possibly due to the motor. Failures may have occured out-of-the-box, but I know of one very reputable person who had an in-flight failure, due to a bad motor. Luckily saved the airplane. I have 4 in my F-18F and if one of my elevators fail, the other elevator would act like a big aileron and the plane may not be saved. How about someone from JR jump in and let us know what is going on. Also, a friend of mine just lost his SM F-18 and was using 8611A's on the elevators. I was spotting for him when after 3 minutes of flight, he made a left turn, and you know you need to pull some elevator in the turn, but the plane kept rolling left and went in. Right aileron did not correct it. This was not the first flight on this aircraft either. No radio hit, and this crash is still a mystery, unless the 8611A was the problem.