So glad you like the videos. Just out there having fun on a rainy day. I too love the way it handles in the air. I was so impressed with old OS. I had heard SF40 was a dependable and tough engine.
I was wondering what happened as I made my last turn! LOL! But....I lucked out as the gyro gods were with me!
As Rich proposed, maybe scaling it up would be the answer. I just am lazy and would rather go heavy and increase the rotor span. It is your call.