I have a buddy who has had problems with his switchback. He can't seem to get it tuned properly. He is taking in to a shop in town that specializes in mathews bows. There supposably the number one mathews dealer in the world. They said all they can do now is have him send it in. Im sure its just a lemon though, it can happen. By the way im a bowtech guy right now but loved the Z7 when I shot it.