Monoline is not only for Speed. A few years ago at the Vintage Stunt Championships Dale Kirn showed how to use Monoline in a stunt plane. Then his son flew a stunt plane using Monoline. One of the interesting points (to me) was how the wires would retain some twist to the point that he would have to spin the knob to reestablish neutral while the plane was in level flight.
I have an old Stanzel class A unit and a class "A" size Kansas Twister. That said, I have never flown speed and never used a Monoline unit.

George