Various concepts which further improve multi-viewlayer coding concepts, are described. The control loop circuit includes a lead-lag compensator that features a lead compensation network configured to reduce output noise without substantially changing the effect of the lead compensation in the control system’s frequency response. A portion of the piston is received in a compartment of the pump and includes a substantially cylindrical body surface having a cylindrical portion and an irregular surface. The frame is pivotally coupled to the body for movement of the frame and decklid together between a closed position concealing a storage space in the vehicle and a first open position allowing access to the storage space from a first end of the storage space.