The rod ends should thread in at least half way so that neither end can thread out in case the control rod comes loose and turns (either direction). Have you confirmed that the sticks are parallel and that the actual control rod is the correct length (20.5" I believe).
Paul vS (yes I'm also a Van)
Building RV-6A #22320 O-320 FP. Airframe structure 95% complete, now working on integration, plumbing and wiring.
Flying my Aeroprakt A-22 STOL and the aero club's RV-9A while I build