I've heard rumors that the Zynx/Topcon X20 Console & Topcon's Pro Steer can run John Deere's Integrated Autotrac Machines? Is there anyone out there currently running this? How does it hook into the system? Is it tying directly into Deere's CANBUS, and utilizing Deere's Starfire iTC Reciever? If so, how is the operation? What's the cost of the X20 & Pro Steer compared to Deere's GS2 2600 Display?