In honor of Kim's designs, I turned this into a Polar Express tunnel. I added some height using wood and covered it with printed paper. This way I can run EZ track or atlas on this setup without it hitting the top. I also took out the base and beefed up the insides with wood epoxied to the plastic. The doors were left off on purpose. This is a nice model.
Note to mods these are square photos. Please help me fix.