Hello,
We’re running this setup since a while it seems to be working great.
It’s based on: https://my.jdmrtk.com/
Oficial documentation is here: https://my.jdmrtk.com/quickguides/John%20Deere%20Mobile%20RTK%20Guide%20-%20English.pdf
So what do we need?
A John Deere tractor + SF3000 / SF6000 fully unlocked to RTK.
A JDLink with Active Subscription. (So we have MTG / internet)
Add an MRTK license on top of this (~400EUR for 5 years).
Have a base station other other correction services.
Register a domain / have a dns entry that has “jdmrtk” in its URL. (I bought jdmrtk.hu as it was available and registered centipede.jdmrtk.hu / emlid.jdmrtk.hu 
)
Then we choose the MTG option in the terminal enter our URL / port / password / base station.
Enjoy 3D-MRTK
Video: (Hungarian on a Hungarian terminal maybe someone will produce one in english)
Bonus:
If you lose network for 15 minutes you can enjoy 3D-MRTK-X