I just started to use my new APM 2.6. Initially I was using a KKv2.0 on that same Frame (Quad X Frame)
With Mission Planner (1.3.34) I did all initial setup : Firmware(ArduCopter 3.2.1), Frame Type, Level Calibration, Compass Calibration, Radio Calibration and ESC Calibration (all at once).
After that in Flight Data Window while moving my Frame I see proper feedback: Pitch/Yaw/Roll.
In Radio setup moving Rudder stick, I got Yaw feedback, Elevator Stick, got Pitch Feedback and Aileron Stick get my Roll. So everything seems to be OK
But when using my Frame what a surprise … Roll and Pitch are inverted. Aileron stick gives me Pitch and Elevator stick gives me Roll …
What did I make wrong ?!?
NB: if I swap Aileron/Elevator from my TX, I got proper behavior with my Frame … but not under Mission planner.