We saw one of these just today. This dude recently had new string and cables put on his Switchback and the idler was leaning, quite badly I might add. I'm pretty new at "bow teching" and even I could see it. It was leaning right, so we twisted the left split yoke cable, mounted on the outside of the limb next to the idler, 3 times and pulled it back straight. Shoots like a charm, now.
Yet ANOTHER reason to stay away from Mm.....Ma......I can't even say it.....
