Unfortunately, I hit a slight bump in the road last night. In an effort to save a few bucks, I bought a few rolls of cheap paper towels from the dollar store. Much to my chagrin, they'd disintegrate the second I lifted them out of the plaster mixture.
As you can see from the photo, I also mocked up the eastern portal of the Gallitzin Tunnel. I'll do the same for New Portage tomorrow.