I'm in the process of setting up cable pulley steering and had a question.

Are the two additional pulleys on the motor bar really necessary? I understand it makes the steering easier, but it would simplify things without them. Can't I just run the cable off the drum, through the pulleys in the coaming, and back to the motor bar, with a spring on one side? Effectively skipping the two pulleys on the motor bar and anchoring to the bar rather than returning to and anchoring to a point on the coaming. Or would the steering be too difficult to be effective?