In answer to your e mail I can say that we very happy with the service you supplied for us. It hasn't been 120 days yet but I have not seen any tunnels. We very impressed with the technicians (I will call them technicians as I'm not what your word would be for them), they were efficient, helpful and most important was that they were polite and were more than willing to answer questions for us. Our sister and her husband were pleased as well.