[Grim Tuesday]

Thanks a ton artdutra!

Can you explain how the "cart" rises up the "ladder"?

Is it pulleyed? Or is it propelled by that huge gear?

I also don't really get how the second stage of the arm rises (or is it technically the first stage?)

EDIT: With no height limit this year, what is the advantage of a dual stage arm over just one really tall but well supported single stage one.