So I got some of the War-era designs on Monday and started working on them, with these results so far:
But I'm stumped on a few details, such as the little square bits on the back between the nacelles. What are those supposed to be? I'm also not sure what color those ovoid things on the inside of the nacelles are supposed to be either. Any help on coloration for these elements would be really helpful.

But I'm stumped on a few details, such as the little square bits on the back between the nacelles. What are those supposed to be? I'm also not sure what color those ovoid things on the inside of the nacelles are supposed to be either. Any help on coloration for these elements would be really helpful.