nubo, you'll find that if you add a twist to one of your cables it will move one of the cams, if you add a twist to the other it will move the other cam. twisting the string will adjust them also, but probably not the way you want them to be adjusted, it will probably make them move the wrong way. i used to have a black knight dually, and this is from memory, but if you pull on your string a little bit, and the cams go the wrong way from between the marks, then tightening your string will make it worse. it seems like i never really had to mess with the string much, but was tweeking the cables on a fairly regular basis.