A pole reinforcement truss has an open cross-sectional configuration characterized by opposite side flanges that diverge with respect to one another as they extend from respective opposite side edges of the truss body. The assembly includes a fixed member fixed to a vehicle body, and a rotary member rotatably supported in the stationary member through a bearing and mounted to a vehicle wheel. The UHMW troughs for the boot mixer and discharge chute improve product flow and mixing, and simplifies cleaning of the troughs. A buffer circuit supplies a voltage lower than a low voltage VDL for logic to a gate of the second transistor to make a drop in an output waveform gradual during an address electrical discharge.