I am trying to run a new SteadySteer and IC1200 setup with a JD SF6000 receiver that is currently subscribed to SF3 accuracy.  I have the TCM corrections on the SF6000 turned off and have the correct nmea strings enabled at 10hz.  Question is with the SF3 subscription active on the SF3 can I expect the same corrected +/- 1.2" accuracy for planting corn?   Also, will it run Ag Leaders "true north" pattern guidance line method and not Deere's "magnetic north" lines that very slightly curve?  This is hard to test out b4 we start planting but hoping to hear some opinions so I don't regret it later.  Thank you!