A new variety on the gauge holder. Replaces the spacers between the fan and the heat sink. Designed for the 2x but would probably work on the Rep 2 also. Creates a durable pressure fit with the mounting bolt on the back of the dial. Easy to remove the gauge when not in use. It gives the benefit of using the jog controls to navigate the dial. http://www.harborfreight.com/1-inch-travel-machinists-dial-indicator-623.html