Basic problem is folding arms. During the flight, one arm just fold out unexpectedly. It must be fixed for the future. Next trouble is, build the stable, massive and light landing gear. It is an essential condition for testing and learning flights.
Next i have to find out the best propellers.
So, first flight bring me a more work than enjoyment, but it is definitely move ahead. I see light at the end of the tunnel, and probably will be in FullHD :-)