That's an insane layout Mark! Looks fantastically fun
Question about the pics; have you ever had any luck using the camera without the flash? The reason I ask is (and I'm sure you've noticed this yourself) that the models tend to look flat, textures wash out and build flaws jump right out of the frame when using a flash. One thing I often do when taking promos is use reflected or diffuse light sources. That can be anything from a white plastic cup taped over the flash, a strong table lamp reflecting off a white ceiling or an open window on an overcast day. Even a standard overhead light source will do the trick in a pinch.
The only reason I bring this up is because you obviously went to great lengths creating your build but I think the flash kills some of the WOW factor. I've heard it said a few times that the models look much better in person and this I think can be directly attributed to direct flash photography.