Taking down Marty's layout was, in every way, a tough job. Along with the emotional difficulty, it was physically difficult as he built it like a fortress. I spent a lot of time on top of the benchwork that held Marty's large passenger yard, and it was rock-solid. I think it could've held a real GG1.
The signature wall was pretty much the last item we removed. After careful inspection, it appeared that it wasn't sheetrock, but instead it was a thin masonite board fastened to the wall with brads. It's as if Marty had planned that the wall would someday be removed and preserved. It came off very easily, but I was sweating bullets as I went around it with my prybar!!
John