A device is disclosed that uses a flow-control methodology to control sprays at very high precision and frequency. The metal comb structure also includes a second comb which includes a first set of metal fingers inter-digitated with the metal fingers of the first comb, a first set of vias associated with the metal fingers of the second comb and a connecting member connected to the vias thereby connecting the metal fingers of the second comb. After beginning the recording, the media content being recorded is analyzed to determine an actual start time for the media event. A first keeper is then placed into a gap between the wall and the floor member, and acts in compression to prevent rotation of the wall. The exposed layer stack can then be etched with multiple etch chemistries. A system can include a hardware component and a software component in operable communication with the hardware component.