I'm new to ArduPilot and a in the process of setting up APM 2.5 on my plane with the latest versions (Arduplane 2.74b and Misson Planner 1.2.62).
I have been following the instructions at http://plane.ardupilot.com/wiki/flying/starting-up-and-calibrating-arduplane/
But when I go into Hardware > Mandatory Hardware > Arduplane Level, the "Calibrate Accel" is greyed out.
I would also like to manually calibrate level as my plane does not sit level on the ground (no wheels and round fuselage) but cannot see the Manual level tickbox or couldn't find it in any of the parameters.
I have tried searching for similar issues and did notice issue #113 (i think) relates to this, is there some workaround meantime? perhaps using the terminal/CLI?
Thanks (and apologies if I have missed anything obvious)