640cc Uber Pimp
Happy with the CG I think but I had cut the rates way back it was uncontrollable I am down from 100% to 40% and I can now fly it. One thing I did notice is you can’t cut the throttle it just stops flying having a hard time with that but just a matter of time I will get it.
Which power setup are you running? I'm running the old stock setup. make sure your ESC doesn't have a soft brake and is free wheeling. There's not a lot of mass to keep the prop spinning on these little guys so keeping the prop spinning is just part of the mental game.