JD c670i and yield mapping

[average farmer]

thinking about getting a dome and display for our auto track ready combine.
I know very little about green star equipment but just about manage with a 1800 display and itv receiver for cults and drilling.
I wondering what display would I need to do yield mapping on the combine ?

 

[BRBX]

Have got a 2600 screen coming for this season , think that's the minimum for yield mapping , tom at sharmans is the bloke to talk to.