The Tettra Pull-Pull system is easy to install.  Simply cut the copper tubing into 4 equal parts, to use as crimps.  Next, thread cable through the eyes of the servo arm couplers, then loop it back through the copper crimps, as shown above.  Pull the slack out of the loop, then crimp each copper tube with pliers, taking care to keep the loop of cable out of the jaws of the pliers (see above).  When properly crimped, the cable will remain tight. 

Adjust pull-pull tension by turning threaded couplers.

NOTE: The supplied clear tubing is used for the openings you'll make in the fuse for the pull-pull cable to exit on its way to the rudder.  Cut the tubing into halves for this job, and secure the halves (one inside and one outside the fuse) with epoxy or other adhesive.