"@a_paolo : No, this will not affect the stabilitity in STABILIZE mode, this will affect only the LOITER, AUTO, RTL mode because the GPS is used in this case. If you have damaged the arms of the quad, I recommend you to check carefully that the level…"

"@Hans: You will find a micro-USB extension at:
http://www.rctimer.com/product-964.html
JL"

"@PF: You will finde hex code of ArduCopter firmware in my GitHub at:
https://github.com/jlnaudin/x-VTOLdrone/blob/master/Firmware/ac312.hex
Right-click with the mouse on the RAW button and choose "Save as..." to download the fiwmare code
idem for…"

"Here the CX-20 factory param file:
https://github.com/jlnaudin/x-VTOLdrone/blob/master/param/CX20_PID_..."

"@PF: you will find the AC 3.1.2 firmware source in my GitHub at:
https://github.com/jlnaudin/x-VTOLdrone/tree/master/ArduCopter
JLN"

"@PF: I suggest you strongly to reload the original AC 3.1.2 firmware which gives excellent result with the mini-APM installed on the Cx-20 (Nova).
Look at my onboard video with a GoPro 3 and see by yourself the result...


Do not change a winning…"

"Test flight of the Quanum Q-2D Gimbal installed on the Cheerson CX-...
Regards,
Jean-Louis"

"Hello Mathieu,
You may change the motors mapping in the library itself. Look at the file AP_Motors.h in the AP_Motors library.
I hope this will help you.
Regards, Jean-Louis"

"@Eric:
If you cannot arm/disarm the motors, there are some reasons:

if you have replaced the original receiver by another (such as Futaba, Hitec... receiver):
You need to disable the throttle cut setup by putting the throttle trim down to the…"

"@Rolf: Yes, the Radio Tx is connected to Rx pin of the APM and the Radio Rx is connected to the Tx pin of the APM.
You will find some additional infos about the 3DR telemetry at:
http://plane.ardupilot.com/wiki/common-using-the-3dr-radio-for-tele..."

"The link to the Telemetry connection tutorial is pointed below: 

Connecting the telemetry to the Cheerson CX-20 Auto-Pathfinder (als...)


Regards,
Jean-Louis"