Let me say this, it flies great, very stable and lots of power... but it is a pain in the "A" to control with the stock transmitter, too sensitive to stick input.
It could be the TX or maybe it is just the way the board is reacting to these motors.
I'm going to try 55mm props to see if it makes a difference, if not... I think I will go down to 7mm motors.
I think it will be a pain to use for FPV.
I have an e010 board with 7mm hubsan motors, F-01 camera, on a 90mm frame, and it flies A LOT better with plenty of power to spare.
Who knows, maybe lower rpm 8.5mm motors will do better, but it is too "twitchy" with chaoli motors.