Martin,
Nice job flying that Ringmaster! It appears your set up is a good one for you. It does seem a little fast, especially for an old guy like me but obviously not a problem for you. As near as I could tell from the video, you were flying about four second laps? I know the thin airfoil on Rings need some speed. I have a Ringmaster with an Enya SS .25 on it which is about right for me. I think it flies five second laps? ( Haven't flow it in quite awhile.)
What length lines and what prop are you using?
Thanks for posting the video.
Regards,
Joe