Words from designer:
I want to make a tracked robot with a paintball gun. The robot and gun will be controllable from a distance. The gun will have elevation- the ability to tilt up and down. The tracked base should be able to rotate in place and climb stairs. By rotating in place I should have the inherent ability to pan- rotate the gun horizontally without adding a separate, expensive and heavy pan mechanism. I want to make something light enough so that one person can carry it.