I always Initialized the system before every flight, so this was not the problem. To date, I have more than 150 flights with the Apprentice, and consider this plane to be my favorite calm, or windy day flyer. Since I also fly helis, I am very familiar with gyros. Again not really sure what happened Friday causing the loss of control with the Apprentice, but I have completed 15 flights with the DX-18 G2 since then. So I feel confident that the transmitter was not the issue. Anyway, got a new Apprentice in the box that will be assembled today so I can get the Trainee back in the air Wednesday.