A fuel cell bipolar separator plate of variable length is formed from a sheet having a fixed width. The stream, or sub-streams meeting selected search criteria, are displayed in a variety of forms, including a receding, partly overlapping stack with aids that facilitate user interaction. The noble metal insert for the center electrode is preferably in the form of a cylindrical Ir-based tip, which is received within a complimentary recess formed in the center electrode. A pulling lever is connected by a connector pivot 23 to the pivot member, and the pulling connector is connected at a lever pivot 29 to the pulling lever.