!Somehow I managed to mirror the impeler while printing. The model is fine, It is from the original thing, but the pictures show wrongly printed impeller.
Also, the scale of this print is 0.5 for everything but motor mount. Pay attention!
Just changed the motor mount to hold Turnigy L2205-1350 Brushless Motor. From quite a strong draft from under the impeller towards the motor I'm judjing the motor mount should ideally be closed, but it's not good for an outrunner motor.