A grass mowing machine operator platform (114) includes a one-piece plastic composite molded structure with a top surface and an outer wall, and a plurality of slots (146,174) in the top surface and outer wall. A pair of steering levers (156) may be pivotably mounted to steering pivot bolts in the slots (146) in the top surface, and a brake lever pivotably mounted in a slot (174) in the outer wall. The slots where the steering levers and brake lever are mounted have integral bearing surfaces.
