[Al Skierkiewicz]

Charlie,
The only vacuum you can use on the robot is one produced by a pnuematic cylinder. There is not a lot of volume in one of those so it makes it difficult to achieve with evacuating the volume of a plunger. Everyone should keep in mind that the balls are not going to be cleaned after every match or weekend. They will pick up dirt and other foreign objects from the playing field and the surface will become damaged (scratched) with time.