I just noticed that the XMS-2 looks off-centered in the VAB. I get that its bottom, including the fins, is centered on top of the rocket, but you can see the shuttle body is way off to the right; this configuration would unbalance the payload IRL.

Maybe we could shift it over to the left a bit. I thought I could maybe just modify vab.img.0.png, but there's no room. I guess we'd have to modify vab.cpp.