Still not quite perfect.
looking at it on the sphere, the eyes look a bit high up, makes the top pinch up a bit.
if i had seen a shot with it on the sphere, i would have suggested lowering the eyes or just that top piece, to fill in the gap between the plate and the eyes.
but the improvements youve made on the metal shading and brightening of the eyes are noticable.
the metal looks much more like metal and the eyes are more of the focus now.
well done