Closing the gash

What are all these houses doing on the tracks? Looks like the whole town moved! 

Indeed!

It's time to close the opening under the town hall square ("Rathausplatz") and rough in main street down to the station and the track crossing.

The trick here is that the whole town -- all the way down to the freight shed -- will remain removable. Thus in order to avoid a multitude of visible cuts, I'm building one large piece by gluing pink foam sheets between the hardboard supporting the town and the styrofoam piece where the freight shed is located.
This way I can lift out the whole section, and do the messy land form sculpting in the backyard next week. In addition I can build streets and squares for the town, wire and detail everything at the workbench. 

I've never worked with pink foam before, but already am finding it far superior to styrofoam. I'm using DAP Dynaflex 230 silicon caulk to glue the various layers together. There's some foamboard in there as well to get a tight fit.