A main stage in-line pressure control cartridge. The vertical distance of the axis of rotation of the input spur gear to the ground is smaller than the vertical distance of the intermediate spur gears to the ground. Bias means urges the lower portion of the rocker paddle to always be in its out position whether the switch is in the \u201con\u201d state or position or the \u201coff\u201d state or position. A front face can be formed by the rows of seating in the retracted position, and the handrail assembly has a post which preferably extends in front of the front face when the rows of seating are in the retracted position.