Has anyone installed an AutoTrac controller/universal 200 on an older John Deere tractor/combine? How well does it work and how compatible is it with implements? I might get one more StarFire 3000 or iTC and thinking to step it up all the way to AutoSteer. I would get a GreenStar 2 1800 monitor for it. What accuracy should i expect in real life? What and how should i combine receivers and controllers the best? Pretty adamant as far as display goes. Also, can it be installed on older models, not computer controlled? Like 50 series John Deere? Do i need to add steering sensors?