An exhaust water trap assembly has separated and spaced exhaust tubes, and a dome cap blocking entry of water to protect an upstream catalytic converter or soot filter. The wireless remote unit can incorporate a graphic tablet digitizer for signaling signature data to a personal computer. The method further comprises determining a detector adjustment value for each detector, determining a crystal adjustment value for each crystal in each detector, and discretizing the crystal adjustment value for each crystal to produce a discretized crystal adjustment value for each crystal. The cut strips of material are stacked with similarly formed strips to form the honeycomb structure.