This is where I will write about the uses of BuckyBots for creating megatructures.
A Megatructure is one in which the constructor is dwarfed (by many orders of magnitude) by the structure built. That’s my definition.
For instance, the empire state building has a volume around 37 million cubic feet. A geodesic dome of 1,000 meters diameter (assuming it is a hemisphere) has a volume of about 2.5 BILLION cubic feet — about 67 times the volume of the ESB. An average human is about 2.5 cubic feet. So, the ratio between the structure enclosed volume and the constructor (a human) is about 10^7 for merely really big structures, and about 10^9 (or larger) for MEGA-structures.