You remembered I love the 6929, and I felt heavily in the trap !Yes , I agree that it's surprisingly not so simple - and you'll notice that I changed the color of the cockpit hatch from trans yellow to solid blue, as well as the trans green/red colors of 3062's, for that sort of matter.
I had some hesitation, too, on these damned blue and grey 3942's... Finally I thought that the whole thing would be ok like that, if just for a quick and "just for fun" post.
For what it's worth, I just tried this possibility too:
Hell, it's possible to spend hours on this sort of issue... as much as, for example, when searching for the best orientation possible of studs logos.
I'm curious about the solution you found, if you ever found one!
Your grey-and-blue Galaxy Commander if rather fine, though, IMHO.