For even further reference, Simple Boy is the song that he utilises the Stack the most (throughout a whole song, anyway)
and then he plays it at the end of Change
(Starts around 12 min, when he jams out on it)
Then there is actually a camera shooting from underneath it and it looks like a 20" crash/ride with a smaller crash on top and then a splash.
Either way, it's going to be a long day at the drum store, when I start experimenting with Stacks :D