The reason why I say 5 axis,

not 3. Even though 3 axis can make cylinders

from the cube. What if... Lines on outer

walls, must be made into a slope -

(usually doesn't) but more importantly,

such angles will allow production of

giant gears. Be the inner material

is first wood, then later covered with

plates of metal (aluminum) or aluminum

in its entirety if to change the drilling bit.

(if required)

 

This would allow buildings with different

functions/purposes. Buildings that 'move'

partially - hidden rooms, clock towers,

light houses that move from the top(?)

entire buildings that hides itself?

xD

 

Well, not so great examples,

but there will be more functions...

If not to create giant machines for other

reasons.

 

So adding 2 more axis from the 3 could be

worth it.