45 miles south spingfield il. | I have a DJ monitor not real bad to use { never had anything else } I push the purge button just as sprayer starts to move, when up to speed the foot switch will control booms . you need to push the button going slow through a turn or ditch to keep boom spraying. As for widening the wheels if you find the sprayer steering funny- you might have pushed the switch by mistake- don't ask how I know this. first field is a handful then you get used to it |