The robot got its first real test today. We filled the barrel up with candy (with a foam plug put in first) and let it fly. The kids loved it! We haven't had any problems with the shooter so far, the only thing is that we still need to make sure it's completely air tight. I do believe we have a problem with some of our gearboxes, but hey that's what happens when you have the programmers build them.
So far we are very pleased with the robot and its performance. The crowd of children and parents were very excited and impressed.