Just wondering could you make a ZK-SJB
(the one with the blue engines)
Also for the colour, I think it needs to be whiter (it appears to grey for me) with the grey belly (but then again it might be the quality of the screenshot)
Also do the registration in the same colour as the "Air New Zealand" and in arial font or something like that. If you wan't, I have some pictures of a 737 that could help.
Here are a few of the pics

The title and ribbon

Registration

Engine
I have some more if you want them.
P.S. good on you for making an Air NZ repaint