Engine House Foundation Take 2

I finally got around to fixing up this part of the layout that had been bugging me: the engine house foundation. The styrene floor of the engine house was always just at the level of, and possibly slightly higher in some places then the tops of the rails. This occasionally would lift up one or more wheels of an engine just enough to cause it to stall out. This didn't happen all the time, it was similar to the annoyance of dirty track.

A few days ago I got fed up with it and ripped out the floor. I sanded down the floor pieces a little bit to take some height off of them. I also used cork as the side walls of the foundation instead of trying to cut styrene sides, since it is mostly hidden by a slight incline of terrain anyway. I finished relaying the floor yesterday and was able to run trains on it today. The engines now run smoothly into and out of the engine house area.