I read that article that the link was to.

Isn't 7 degrees on each end going to make the head speed go past 2000?

Also I have a fury and a raptor 30. I am a bit afraid to fly the 60, but I know I can handle it. I was wondering if a stock raptor 30 with wooden blades be stable enough to do aerobatics. Are there any precautions to take while setting up this type of heli for mauevers like death spirals, tumbles, or rolls.