Just a quicky to see if this is actually possible... My 2014 riMac went in for a screen replacement a month back due to black shadows on the screen. Having been using it for a month now, I am convinced that the whites are much better on this panel and that the colours look better. It is possible that it got an "improved" 2015 panel? Would Apple stop using the 2014 panels and just run with the 2015 ones for replacement. Just curious.