For a while, guys in NY were racking with the numbers touching as much as possible under the somewhat dubious notion that the paint/stain whatever was slightly raised and having these two raised areas meeting, gave a slug rack. This came about through trying to figure out why when Frankie racks, you almost never make a ball. They thought that was his secret.
Frankie is the king of the rig rack. Your only chance at making a ball is to play the 1 in the side pocket.
Eric >must have learned from Morro