For those who don't know how to weld and or have no welder there is an alternative. On the rudder half, you will find the upturned metal that is what mates with the stops on the airframe. I drilled and tapped a hole, through which I placed a bolt. I have a jam nut on the bolt and when the bolt was at proper distance I locked it down with the jam nut and used a second nut on that to maintain the placement. My bolt head then contacts the stop.