The parts arrived and were wheeled into the containment area. Immediately, the nanobots detected its presence and began to absorb the materials. Metal clanked, gears ground, and the two-turretted tank began to rock to and fro.
In a matter of minutes, instead of hours the nanobots grew the lower halves of the tank. Now one tread appeared shared by the two turrets. Brett Matthews double checked to make sure the cameras were recording all this. There was a loud grunting noise, he thought not unlike a giant giving birth. Then, where there had been one tread, a second tread appeared to spin off the other rotating tread. He couldn't say whether is was top or bottom, maybe the tape would tell.
It looked like turtles trying to mate on land. The top one tilted precariously, and the bottom one rocked trying to get free. Shouting voices could be heard over the noise.
"Get the FUCK off me, you cheap clone!"
"Who you calling clone, knock-off? I'm the real Jake!"
"Boys, boys!" Matthews shouted through the microphone. There was no way he was getting into the containment field until the nanobots sounded the all clear, that production was done.
"You are both Jake. You're identical twin Jake tanks. It was an unforeseen side effect of the process. Relax, separate, you'll be fine."
The tanks were apart, neither upright. By manuevering their treads and guns, the two tanks righted themselves. The two squared off barrels aimed low directly at each twin. Slowly, they circled each other, like two wild deer rutting for territory. Only these deer had 20lb shells and steel hides instead of antlers.