[Eugenia Gabrielov]

I would say being able to obtain tetras from your teammates is important. If for any reason a teammate's arm is disabled, and a tetra is smply left hanging, you would have to be able to get it off. Also, valuable time can be saved if one robot "fetches" tetras while another robot takes and hangs them. For example, if a small robot has speed but no arm but the larger has a great arm mechanism and is slow, it is a good way to save some time by perhaps using the "box on wheels" as the runner.