Cattrack you are right.  I have no personal experience with the yield sense and what I posted was just what I've been told.  I should have been more clear on that part.  I will be very interested in the side-by-side monitoring some posters are going to do.  It is possible that your  yields are even better than you have seen, but the biggest question is that really that important right now.  With field scripts coming they are talking about doing rx maps in 30ft.x30ft. grids and that's when the high resolution yield maps will come into play.   Do I think that type of resolution is needed.  No way.   But is that what it will take to go to 300 bu. averages, that's what they will tell us.