for balance would make them use components for its structure aswell as coppronikel... and you would need more temporal gears to improve its speed, what are its advantages, each fully upgraded 1 works aswell as 1,5 or 2 full windmills, its speed is stable, but! BUT! they accelerate a lot during temporal storms.
main advantage, no need to build huge structures above ground to get the best speed or depend on wind at all for doing work, downside, you would need several hard to get materials.