For those who want a good looking protection dome on their drone. It's still possible to reach the cables inside, but everything is well protected. It fits with the standard screws of the frame, just put it in between.
I'm using it to protect a Hobbyking KK2.0 Flightcontroller.
The holes of the first version were too small for the M2 screws. That's fixed now. Enjoy flying!
I think it's even possible to print this thing without supports. I recommend you to use them though.