[EricH]

Originally Posted by IKE

Does that mean that Bumpers on #1? Please tell me bumpers are not #1...

Bumpers are #4, I think. The most important parts of the robot, in order:

Drivetrain, Drivetrain, Drivetrain, anything that makes the drivetrain legal (bumpers included), game object manipulation #1, game object manipulation #2, game object manipulation #3.

The difference in the game object manipulators: #1 is acquisition, #2 is delivery, #3 is either anything internal to the robot or working with any stationary field element. The reason they're game object manipulators is that it's quite possible that they may be dealing with stuff other than game pieces, like mobile goals or bridges or hanging bars.