I scratched my ear at an auction and ended up dragging home a 4730 Deere SP sprayer.  The previous owner kept his globe and moved his activations off of the 2600 display.  I'm looking for the most economical way to upgrade to autotrac and swath control.  Since I'm on 20" rows, I think RTK would sure be handy but I'm allergic to expensive subscriptions.  From what I can tell, it looks like my best option would be to go with a G5 universal display paired with the CRG RTK receiver with a built in cell modem to access my states CORS network.  Are there any better options that I'm missing?

Is there any real difference between the G5 universal and G5 Plus other than screen size?  Do they both really come with lifetime auto trac and section control activated?