The way I'm building my board now is in 4 2'x2' sections. For the buildings, I am going to glue only the first floor onto the board. Each floor is going to be 2" high, so all the buildings will be uniform in scale. The rest of the building will be magnetized so they can come off. So the boards themselves can be stacked easily without squishing each other. The rest of the pieces I was thinking of grabbing a large cardboard box, and filling it with foam. I could cut out the foam into the shapes of each of the building pieces, like cookie cutters. It's going to take up a lot of space, but it would be mobile. That's really a big issue for me, since I want to bring it out to my local game stores. How do you do it?