I had some questions about how the three Mega Lab maps were meant to fit together so I did a quick hack job (I mean, totally awesome amazing layering job) to give you an idea of that. They are not a 1:1 fit- the trick is to match up the elevators.
I view the Mega Lab base level as the top level, Residential as the mid, and the Bay level as the bottom- however you can adjust them however you want. I hope that the images help a little bit about it.
I may, 100% no promises, its a small possibility try to do some sort of cross-section to better portray it. I have a lot on my plate the next couple of weeks, however, and while I have already managed to post 2 maps this month I do want to keep the forward momentum and push further if I can, so I may not be able to sit down and work it out.