A medical device known as an implantable therapeutic substance delivery device is configured for implanting in humans to deliver a therapeutic substance such as pharmaceutical compositions, genetic materials, and biologics to treat a variety of medical conditions such as pain, spastisity, cancer, and many other conditions. Each device includes a communication controller that includes a data queue and a queue of received message objects. The receiver is configured to receive a first SIP message. The operator further selects the corners of such surface in which the artwork is to be carved.