Metal expands and contracts according to the temperature. If the RBS is enjoyed in an area that has temperature fluctuations this can affect how the ball behaves. Also, you might find you encounter inconsistent performance in a climate where there is a lot humidity, moisture on the balls will affect their performance. Keep this in mind, especially when first turning on your new RBS. Or if it has not been run in a while, dust can build up on the tracks and slow the ball – causing performance issues. Please contact me immediately if you need help with any of this.