[JesseK]

I think steel is perfect for the robot who decides to be elevated and then who decides to lift two other robots a couple inches off of the floor. With a safety factor of two, that's 900lbs* the tower connectors will need to support. It's well worth the additional weight for a bot who's lifting other bots due to the compactness of strength alone. Score 8 points for the home team!

*120lbs (robot) + 14lbs (battery) + 20lbs (bumpers) = 154lbs... time three robots = 462lbs pre-safety factor