I use S1000 with WK-M and F550 with NAZA-M V2

and am going to use these in southern hemisphere showing different magnetic declination values from here.

Do I need to rotate GPS antenna according to change of the magnetic declination value?

or is is sufficient to compensate the magnetic declination by ordinary compass calibration?

http://www.ngdc.noaa.gov/geomag/declination.shtml

I have not done the puck rotation on my Naza V2 since this was corrected in the last firmware update.  I also have not done it on my A2.  I don't have a WKM any more.  Sorry.

I have never done myself and I don't have a TBE problem so why bother

Thank you, Tahoe_Ed and n2stuff .
I am not going to rotate the GPS of WKM and NAZA-M V2.

I have two Naza V2's with current software and I find that they fly straighter and with less TBE and less "J hook" if I turn the GPS right 13 degrees. (I am in California)