You can use pushrod exit guides that are available. However I just cut a thin opening in the side of the fuse. A dremel cut off wheel does fine. The cable needs very little room and even with a small opening you dont have to worry about the cable rubbing the fuse.

You could also use nyrod as an exit. I havent used it as an exit but I have used it to make a slight correction when I didnt have a straight shot from servo to control surface

You can see some pics of this in my Epsilon build http://www.rcuniverse.com/forum/m_35...epsilon/tm.htm