In a first exemplary embodiment of the present invention, an automated, computerized method is provided for an automatic chromatic aberration correction. It is determined whether any of a number of messages should be displayed on any of the collections of displays, based at least on message attributes of each message and on the display collection attributes of each collection. The collected graff is moved to a stationary cleaning mill in a different location by means of a suitable vehicle such as a truck. 1 micrometer, and is preferably prepared to have a surface finish of not rougher than 0. The runner defines a cross section. The mechanism is a pump which is inside of the ball and which is operable from outside of the ball to pump ambient air into the ball.