It was discovered by stunt flyers (precision aerobatics) years ago that it was easy to convert power into pull on the lines. And we didn't do it with speed, just power.

Use more fan (prop diameter) when you've got the engine to do it. Sort out the lap times with the pitch.

Most Ringmasters I saw were from the Sterling kit and built heavy. They were sorta heavy for the wing area. The one detail that seemed to hurt their flying was the elevator movement. They often could deflect 90degrees. They didn't need much at all. A lot of beginners got into trouble by overcontrolling.