Originally Posted by
jiott
Since the only benefit of the turnbuckles is to 'center' the rudder, a comment on this may help. The rudder is in reality 'centered' by the slipstream, not by your feet, so no fine tuning of rudder trim is possible with cable adjustment. If any rudder trim is required it must be done with a trim tab added to the rudder trailing edge. The turnbuckles would only be useful to center the pedals when the rudder centers itself. It is fairly easy to adequately center the pedals with the rudder when you swage the cables. I doubt that small fractions of an inch error matter much or could be felt by your feet. Nothing wrong with turnbuckles but I adhere to the KISS principle.
Jim