No current guidance system,  Hagie 2101 sprayer, wheel speed sensor is becoming glitchy.  sometimes it works and sometimes when you wish it worked it isn't.  Previous owner must have had a John Deere brown box in it as there is a monitor mounting bracket in the cab.  Have been using foam only for guidance.  Would love a full package of steering row shutoffs etc.  How well does a brown box work for just the row finder option?  Have a green star brown box running seed star on my corn planter.