Here's an easy way to do it. Use a "cable in a tube" linkgae w/ clevis on the throttle arm and EZ connector on the servo end. Pull the throttle barrel all the way shut, and move the throttle servo to the full closed position w/ the trim all the way closed. Then adjust end point to allow full open and closed. Then using the trim adjust barrel position so that you can just see an opening. Then give it a few clicks of throttle stick to start it and adjust the idle you want by using the trin lever. Works like a charm and you can do it in about the length of time it takes to read this.
Al