A computer-implemented method includes a processor identifying, within the netlist, at least one strongly connected components that has a reconvergent fanin input with at least two input paths from the reconvergent fanin input having a different propagation delay to the SCC. The extendable unit has at least one support roller for rollingly engaging at least one of another extendable unit and the support structure as the extendable unit is extended or retracted. The rotor pole crossover includes a body member having a curved medial section and opposing legs extending outwardly from the curved medial section that connect to the ends of the winding. The system includes personalized media by introducing, embedding, overlaying, etc.