One other point, anyone experiencing any mushiness of any control, if it doesn't crash, you should ground the model and check it out. Make improvements to the system until any experience of mushiness is eliminated. A loss of control like this indicates a problem. If the servo is getting blown back the current drain will go sky high and burning up the servo is a distinct possibility. That may have what ultimately caused the loss of these models.

So please, if you're having these problems DO NOT continue to fly the model without fixing it. Even if that means putting in bigger servos.