Like the cubes, each layer of height must be completed,

before dropping the next one into the main area. (That is the tower).

 

Which one is more efficient, stable, predictable I leave it to you Mr Musk.

 

But one has to keep in mind, these must be welded in and out between

each other, and even poured in liquid cement, (not the volume itself,

but areas that needs to be connected)

 

so the easier and predictable way of creating the tracks for these

machines coming in from the sides, and in and out, are the cubes.

 

Not the slices of slopes...