Could you please do this:
Set General/Position to Horizontal (0°)
Then perform calibration with CTRL+ALT+U again.
Set General/Position back to your original position.
Then check if the problem is solved (possibly after restart). If no, I will send you PM with other solution.
[SOLVED] Firmware upgrade to 3.1
Spirit System developer
Ah, please check your PM.
App for iPad is integrated in the Wifi-Link.
App for iPad is integrated in the Wifi-Link.
Spirit System developer
You are welcome!
The issue was resolved by resetting calibration data to factory defaults.
The issue was resolved by resetting calibration data to factory defaults.
Spirit System developer
and how is this done ? 
With key shortcut, but it is not public, because people would try it without real need to do this.
Spirit System developer
