Methods for attaching an integrated circuit die to a substrate. In one aspect the potentiometer and logic circuitry is an integrated potentiometer mounted on an upper surface of a circuit board with circuitry on a lower surface of the circuit board. In the method the gateway is provided with information about the capabilities of the node. The disposable support is periodically replaced. The input processing may include 3:2 compression for bit positions within the range and 2:2 compression for bit positions outside the range, so that further processing is performed for all bit positions on a sum vector and a carry vector. The controller controls a pressure-increasing gradient of a fluid pressure by controlling both the pump and the valve during a pressure-increasing control for increasing the pressure in the brakes.