That's how it's done on the full scale streamline wire, Tim. There are no turnbuckles used with streamline wires, just fittings that the threads on the ends screw in to, and jam nuts to lock the threads with the wires long axis parallel to the air flow. The wires will vibrate in the airflow if they are not aligned properly, and in fact they do at low speed high angle of attack flight, the "singing" sound gives you a good speed cue.