Duplicate a robot within the same model?

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Hi, I'm using the CrazyS repo to create a swarm of four Crazyflie 2 drones with a platform attached. I've managed to add a cable and the platform to one drone. How will I be able to add another copy of the same drone to be attached on a different end of the platform that is currently attached to the first drone?

I'm new to this so any help would be much appreciated! Thanks!