Tracks can be added to this for machines to weld,

stacking can be an issue but since the cubes being stacked,

can also have tracks just like the escalator,

the cylindrical parts can be taken and dropped following

another interlocking track by a machine.

 

as for the antannae, the sloped tracks won't follow to the top.

so it would have to be vertical tracks/elevators,

taking components bit by bit.

 

 

or. ready-made in slices dropped off using a blimp/balloon/helicopter.

and assembled from the top.

 

minimized human labor....