Dual sensor (or Buddy) systems are used to increase 3D scan coverage. In this video, a reverse buddy system is demonstrated, in which two Gocator line profile sensors are mounted next to one another in opposite orientations. Dual sensor (or Buddy) systems are used to increase 3D scan coverage. In this video, a reverse buddy system is demonstrated, in which two Gocator line profile sensors are mounted next to one another in opposite orientations. The benefit is less occlusion, in cavities for example. This video also explains how to align and calibrate the two sensors in the Gocator User Interface within the same coordinate space.