RE: Monoline handle
I'm not sure these were all Stanzel, but in some old Air Trails and MAN, I've seen one system that hooked a single wire from the handle to a 90 degree bend off a torque rod driving to the elevator. Raising the handle tip fed in some up, lowering the handle tip fed in some down. Probably not very aerobatic, but at least you could probably trim for relatively level flight. Then there was the stanzel 2 line system, which I believe is available through the web sight, in which the two wires went through the tip guide, around a couple pulleys, and direct to the elevator. I believe I remember seeing one sytem in which one line was fixed to the airframe while the second line went to a spring loaded 90 degree bellcrank. Pulling on the line pulled against the spring and gave one direction of the elevator, while relaxing tension on that line allowed the spring to move the elevator the other way.
Walker didt it the best!