One month ago we put the raspberry pi into Max's head, to make it easier to add the camera. The software and setup is the same as Robbie's, We added a xbox kinect camera to Max's body for navigation. We found a small problem with Max's wheel encoders. Every now and then the values will spike,moving Max about 3000 meters off the map then Max gets lost. I think this is a problem for dad to fix. But we can still drive him around with a phone and talk to him.