[kpugh]

In addition to what everybody else has mentioned, it is also really important that the two drivers work very well together and get to know how the other one will react in certain situations. When one is trying to drive while the other is manipulating the arm to grab a tetra or cap a goal they really need to be comfortable working with one another as this sort of thing requires some coordination between the two.

I would suggest having some practice matches with old robots. It will get the drivers used to working with each other, as well as listening to the coach. Also have these practice matches timed so that the drivers get used to only having 2 minutes to accomplish the tasks.