Also make sure to consider the thickness of the rudder when measuring how far the clevis is away from the hinge line. You can't just use the control horn's distance from the clevis connection point to the base of the horn. You might be off as much as a half inch or more. It's the distance from the hole that the clevis goes in, to the hinge line. So measure from the clevis connection point to the base of the control horn. Then add one half of the rudder's thickness. Make sure the servo side is the same distance from clevis connection point to servo shaft center. Try to not cross the cables if you can. Otherwise you get more slack on one cable when you go to full deflection (the one not being pulled). If they are NOT crossed, the cables stay at a close tension throughout the defelction (less slack). However sometimes they need to be crossed due to the fuse geometry. Either way, it will work.