John posted a picture of 2015 at EMD without the outline. Ken posted three builders photos of 2016 with the outline. Unless there were units delivered out of numeric sequence ( which could have happened ) the photographic evidence implies that 2006-2015 were all delivered without the outline, but 2016 and up had the outline factory applied. So 2015 would be the cutoff. Paul P.S. 2015 is also the center unit in the group shot John posted with the builders photo, so it made it onto the property without the outline.