What I did with mine was to pinch the top plate between my fingers and try to locate the point where it balances that way. It came in about one inch ahead of where the rear arms bolt on. Depending on the flight controller it does make a difference. I use a DJI Naza M Lite and it will "toilet bowl" if you don't get it at least close. It's not as big of an issue if you're using it without gps. Mine flies pretty well.
Last edited by randall1959; 07-18-2015 at 06:48 PM.