Cobalt-SS Crossover pack: 2x Cobalt-SS and Accessories. Each of the two independent outputs of the Cobalt-SS control board can actually power several motors simultaneously. Therefore it seemed sensible to make a separate crossover pack to make the creation of loops and crossovers easy and economical. Included in the pack are two Cobalt-SS motors and an extension lead, plus a special additional extension lead that will allow you to connect two Cobalt-SS motors in either normal Y or reversed parallel configuration. Of course, the crossover pack also includes a selection of linkages and screws.