Particular embodiments of the inventive technology may be described as a position control apparatus that comprises a fluidic drive system configured to drive, with a single fluidic displacement, each of a plurality of positioners in a first relative direction; and a bias system that includes a plurality of biasers that bias the positioners in a direction that is opposite the first relative direction. In particular embodiments, and as but a few of the many possible design features, positioner actuators may be fluidicly linked in parallel and with the fluid compressor, the positioner actuators may each include a piston; and a plurality of positioners may each be responsive to at least one of the pistons.