The 2015 Limited Run were hand painted with automotive paint and clear coat, and also featured minor component and rule differences:
1) The bumpers were changed from copper tubing to rubber bumpers that don't budge when hit with the ball.
2) The hole was made slightly larger.
3) The rules for placing bumpers were changed. Any time a player scores, the other player gets to place a bumper. In the original, the scoring player had the choice of either scoring a point or placing a bumper.
4) Each player gets a maximum of 5 shots on his turn.