Cost 4, cannot be used untrained. This is the skill of Mecha warriors, allowing them to operate their war machines properly. Fast and Ultra Fast engines both use 1 point of durability. At this point the designer picks armor and weaponry, as well as any extras.
All weapons have amazing firepower, and all mechs have amazing toughness.
The costs listed are for whole mechs, to determine the cost of split armor, divide the cost by five then multiply by the number of compartments covered. Mech pilots need make no skill rolls to move their mechs under normal circumstances. Only random shots hit the head. If the torso is destroyed, the mech explodes inflicting 2d6m on every adjacent hex, 1d6m on the next ring of hexes, and 1d6w on all objects 3 hexes away. If the mech survives that, it sits there helpless against any attacks.