The speed of the front roller is for scoring the balls more than picking them up, as it allows us to shoot the balls across the floor. The back roller stops the balls from shooting out of the top of our hopper when we pick them up, and acts as our stirring mechanism so our hopper doesn't jam often. The Minibike motor has enough torque that unless something is terribly out of line, it won't stall out (or hasn't stalled out in the past).
The back roller doesn't limit us to the point that we jam as we pick up, and we can run at full speed into a line of balls and pick them all up as well.
This design has already been implemented, and has worked Pretty well for the entire 2006 season, so the most obvious design flaws have already been remedied, This is mostly to make the robot look pretty.
