First of all, I've read many posts about autosteer and still confused about it. I have a Raven Envisio pro in my 4440 spray coupe and was thinking about adding the Smartrax MD on WAAS to it. I want something I can switch from the 4440 spra-coupe to a JD 8400 tractor, 9610 combine and 8450 Hesston swather. I talked to Raven and my Spra-coupe dealer today and they said I could use the E pro & antenna I have & buy 1 node and then get 3 more Auxiliary installation kits, & cables so I could swap the smartrax unit, node, E pro & antenna to the one I wanted to run it on. He said the extra kits and cables for each one would be around $1500. The node is about $4400 but forgot to ask what the cost of the cost of the Smartrax MD unit was. I think I'll just ad it to my sprayer and maybe my tractor to start with. I would sure like to know what you all think about this set up since I don't know much about it. 

TIA