Am i right in thinking that John Deere did or still do a range of tractors with built in auto trac ready integrated into the command centre console? reason being is that I have recently upgraded my itc receiver to a sf6000 unit and now have this going spare. I am also having to consider buying a second tractor and would be swayed if i knew that there are machines out there which would allow me to plug this receiver in to get guidance for no additional spend. Probably thinking something around 125-180hp.