I think version is good enough to be final:
It's good, but it could be better.
I liked PixelPiledriver take, and I agree that you should raise contrast.
Metals have high contrast and there's glass here (if the display on its face is made of glass), these objects reflect a lot of light, they can reflect white light if it's been iluminated by the sun, for example. In lower conditions of light the reflex gonna be weak, then you're not going to use white color, but a light green to show reflexes on this green glass, or still another color bending the green with the color of the source of light.
It really depends on the scene.
But if it's not going to be that complex and true with reality, PixelPiledriver take is very good. I like the little led colors he used.