RE: Fictional Late 1940's bomber
You did ALL THAT in Sketchup ! ? ! ? ! ?
I have to say that I'm incredably impressed! I've only doodled around with Sketchup for a couple of simple drawings and found it actually quite frustrating to use. But then it's like any CAD package and spending the time to jump through the hoops counts for a LOT! So I likely wasn't tenacious enough.
From a design standpoint the fuel cells needed on a bomber doodle of this sort are about 1/2 to 1/3 what they should be to cover the sort of range needed for a post WWII "atomic age" bomber. And the tail booms are simply not big enough to be period correct. Look at the booms used on the Fairchild Packet cargo plane for a more realistic view of what twin tail booms on a "full size" craft of this sort and size should be.