Adding an external compass to my apm 2.5 on my quad and following the set-up instructions on the wiki page
BUT
To suit my installation I need roll 180, yaw 180 (or yaw 180, roll 180 I guess) same as mentioned in the wiki page. I cannot find that option in the drop down list on the set up page in MP. There is a yaw 180, but not in combination with roll, which is where it is needed.
I could, but the orientation I decided on came about from reading the wiki where it says roll 180 and yaw 180 are available as a combo which means I could mount upside down and with the cable exiting to the rear (ie backwards and upside down).
So unless I have missed something (quite possible) it seems that is not the case and I shall have to rethink my mounting position and cable run.