and btw mr Musk,

 

if to be making compressed walls/flooring in

them with holes, difficult, (though there

are ways judging by how the compressed bricks

come out with holes in them)

 

alternate option would be,

cutting them in half. (half a circle/half the wall)

by compression and joining them together

with construction aggregate/cement.

the hole should be much bigger than the metal

bars themselves. still very fast way of building.

 

but i think separate compression is unnecessary

if done correctly.