I have one and what a cool plane! I have my CG at 155mm and it will pretty much fly inverted hands off. I upped the low rates a little from the manual (maybe 5%, just personal preference) and set all I could get for high rates with expo. On high rates it will flip over on a dime. Flat spins good but you have to find the 'sweet spot' instead of just cramming the sticks. Hover, flip and back to hover. Waterfalls easy. Allot more radical than the UCD I had.