This is an update to my previous post about bulding my first quad copter. Finally the most important packages from China & Hong Kong has arrived, containing the motors and the new Hobbywing Quattro 20A ESC / 3A BEC.
I have also purchased the Turnigy 9x which was quickly updated to the ER9X firmware using a standard Arduino as the programmer. I followed the instructions from here in case someone needs to do the same. I plan on upgrading the radio to the FrSky ACCT module which spreads over 40 frequencies rather than the Turnigy's 16, so it should be more resilient to interference from other 2.4GHz radios.
After having set up everything, verifying the correct rotation (and propeller placement) on each motor, calibrating the ESC and leveling the quad it was time for a test flight. Indoors of course, and with about 2x2 meters of unobstructed space available :-) I'm happy to report that it hovers like a dream in stabilize mode