Visualization Technology Inc. needed to add a sensor to an existing surgical instrument for their image guided sinus surgery system so they called Stream. Surgeons loved the existing forceps because of their delicate lightness. Adding a bulky sensor would completely change how they used this tool. Through extensive use of models and user interviews, we came up with an unobtrusive shape, and an easy way to install the sensor. We also created a mechanical means of attaching the sensor that was highly accurate and repeatable. The success of this product led to the redesign of all other parts of the system- the curette, microdebrider and controlling cart. Visualization Technology Inc. was purchased by GE Healthcare.