I've been flying for 7 years and have been instructing students for about 5 years now. I've several gadgets like what you are using. I can say this for a fact, they are NOT designed to control the plane in ALL situations. All they can do (and are designed to do) is keep the plane in level flight once it is up in the air. My advice is to take the device off of the trainer and use a buddy box to instruct the student. Nothing beats a pair of experienced eyes of an instructor to keep the student out of trouble.