The EZ Connectors are IMHO a disaster waiting to happen. I can't count how many time I've seen people lose their plane because of the EZ Connectors. The vibration will cause the screw to back out and then the control rod can slip freely and you have no control anymore. IMHO you need to get rid of the EZ Connectors and put Z-bends in your control rods where they connect to the servo arms. An EZ connector on the throttle control is ok because if it slip you can just fly around till you run out of fuel. Even having one on the rudder is ok to because you can still fly with your rudder flopping around loose. But on the elevator and the ailerons you can't afford if you lose these controls, use Z-bends here.

Hope this helps.

Ken