A stapler apparatus includes a clamp positioned to receive and stack sheets from a printing device, a support plate comprising a groove directing the clamp along one path of multiple paths, the multiple paths alternately directing the clamp relatively closer to one of multiple staplers. The AD converter is configured to generate digital samples of voltage and current waveforms in a polyphase electrical system. The plating liquid may further contain a sulfurous acid compound and an aminocarboxylic acid compound. A differential pressure is applied across the pressure zones, moving a piston element in the tool assembly. A computer system may perform a simulation of the selected rework process to determine whether the selected rework process provides the rework for the identified section.