Hi, this is the save of this movie (http://mkv25.net/dfma/movie-1137-apocalypticmachine) and this thread of the Bay 12 Games forum (http://www.bay12games.com/forum/index.php?topic=31691.0). It is almost vanilla, I have just modded some stone to make it magma-safe so it should run ok for you.
You should know that you'll have to remove the up/down stairway in the +1 floor before pulling the lever and I'd suggest you to play with temperature OFF because it will cause people to be drowned (unless you want them frozen instead).

Any bugs please let me know through the forum.