I was following the Guide on PX4 but noticed that some parts are no longer available. So I used NTM 28-36 1200kV for the Lift Motors with HobbyKing 10x5 Thin E-Props. They are driven by DYS XSD 30A V2 ESC with BLHeliS. Flightcontroller is a Dropix from Drotek as well as the GPS (uBlox 8M from Drotek). The Airspeed Sensor is from mRo. Flight Battery is a 4S 3500mAh LiPo.
Mechanically the construction is very close to the PX4 Page. No reinforcements so far (except the carbon Plate reaches from the Lifter-arm to the nacelle), but I have seen that it would be good make the whole construction a bit more rigid.
Firmware was PX4 1.7.3 Master Build.