Got Robby's ear motors aligned correctly (after a couple more tries) and the radar turns very nicely. I've been doing a lot of experiments with the computer programming side of the controller in Easy C so the motions will be random.
The last thing I need to do is to mount a switch to the microcontroller in the foot section. That's because it is so darned difficult to remove the dome of Robby unless you have a couple people. I can do it by myself but it's tricky holding the dome while you undo the quick release wires. It will be comforting to have a kill switch to the controller.