A trick to line them up is making a master template like what was done with the Opensky 777-300r, Basically one big Side shot, then using reference markings you can cut and paste it all into place. Works every time. Just a pain sometimes to put it together, kinda like Virtual Lego.
I gotta stop looking at these MD500 posts, Some stupid Issue with Shaders and my new Video card makes my md500 Invisible Except Seats and People, Real pain when paid for.