Was everyone on board with reusing the DIG display?
First of all, for a potentially unstable structure, putting the DIG display in a case behind glass is a lot different than leaving it in an open room with people of various blood alcohol contents milling around.
Also, while I was looking at the rebuilt DIG display, it seemed like the mostly tan Indiana Jones scene did not really fit in with the rest of the display. It can be left out if there is to be one fewer layer.
I would rebuild the batcave and the dragon chamber for greater stability before reusing those cubes.