rudder cable question

The tail dragger I am building shows a closed loop rudder cable system. That
is to say both front pedals are joined by a cable that loops around a pulley
in front of the control stick on the floor. There are also pedal return
springs.

Is this extra weight and complexity needed? What is the advantage or
disadvantage? One point that my be pertinent is the rudder cable branches
off with a lower cable to the tail wheel just after it exits the fuselage.

Any thoughts appreciated.

--
Robert Loer
LM-5X-W
Southern Oregon