I only use flex cable for the engine throttle pushrod and steerible nose gear. It's benefits are it is very flexible allowing passage through and around tight areas in the nose (always a busy place). I use a ball connectors at the carb's throttle crank or nose gear crank and solder a threaded connector to the flex cable. The threaded connector is screwed into the ball connectors. The plastic sleeve is cut short so as to not interfer with throw and I may flow solder into the cable, if it needs to be stronger and less flexible (nose gear). From my point of view flex cable is the correct product to use in this application.