Could an expert and/or DJI rep please advise.. I have the newest Naza m v2 and firmware
(as of June 2016) and I'm coming across varying opinions as to whether or not it is necessary
to manually rotate the gps puck to accomodate for magnetic declination?
I'm in Nova Scotia and have adjusted mine for -17.5 W
Seems to fly OK but is this necessary or advisable?

This is what I got from DJI support.
Doesn't really answer my question.

"As long as the flying environment conforms with our request in our user manual, and before flight, connect your drone to its assistant software to check all the parameters are ok and then calibrate the campass for no error, it's OK. Of course, everytime you change a place to fly, you need do those preparations. Thank you."