MMM interesting topic. Correct me if i'm wrong. If you have your servos connections the same distance from the center line of the servo, and the connections centered across the servo, and at the tail the same thing centered both ways you couldn't get a loose cable. if the servo pulls the cable forward 1/8 " then it is going to release the other side 1/8" so therefore you shouldn't be getting slack line, because no matter how far out you have your control horns (or in) it is still only going 1/8" both sides. You could only get a slack cable. you could only get a slack cable if the connects aren't across the pivot point of the servo or tail. by moving forward of the pivot point or back from the pivot point it is possible to get slack or even overtightened cables.

my 2c worth.

Prboz