On a Dondra catamaran we try to place only the best parts as much as possible.
The Dondra carbon mast is lighter, stiffer and can carry more sail on top. The mast is a “chimney mast” without spreaders, which again gives less resistance to wind.
As the fewer side cables do.
The mast is held vertically by textile cable on the side.
A steel cable to the front is the basis of the rotating fore sail. If you want, you can have a second steel cable forward.
The mast has a wing shape so the sail works much better.