Here's what I can tell you, Garmin specs WAAS correction at 3meters so for lightbar guidence it won't work at all. I used an 18x 5hz this year for mapping with a Viper2. It maps alright but every jar the tractor makes going across the field shows up on the applied map as jagged edges. The position occasionally drifts those 3 meters leaving the appearence of skips in the map. I also sprayed one day with a Raven Phoenix 200 reciever. The coverage map was night and day difference.