In the past I've had the honor of doing the controline stunt concourse judging st the AMA Nats. This provided the opportunity to examine the best airplanes, very closely, including Windy Urtnowski's. His airplanes have always been among the best, and several times he has been awarded a perfect score. Similarly, Dave Platt is not just a great scale, and all around modeler, he is the standard to which others have been compared to for almost 50 years. So the take away here is that any techniques recommended by either of these gentleman should be followed whenever possible.