I knew this heli was a bit more squirrelly than larger aircraft, but if a seasoned guy like you can't fly it inverted what chance do us beginners have? I've looped mine about 4 times, but was afraid to try and hold inverted. You have dual rates and expo set up on yours? How was the tail holding? Is it the stock motor and tail blade? When I flipped the stock set up on the CP, it would not hold the tail at all. The spinning would start as soon as negative collective was applied and it would basically screw itself side ways until it hit. The brushless tail motor with the HH gyro holds much better which is why I was able to loop it.