Thanks Overrevdsquat, that's the sort of thing I'm after. They definitely look like they have some function as pumps or generators or something. I like how you've got a pretty simple set-up - the cartridge, some tanks, a pipe and a tank/boiler. It looks like a purposeful set-up even if the exact details aren't there. What's in the tanks? What is being heated (or condensed)? It doesn't really matter, it looks suitably functional.
Do you have any other views? And what other bits did you use? The 'boiler' looks a bit like a Kinder Egg capsule - is that right? And what did you use for your pipe?
Sorry for the third degree, but the pic has whetted my appetite and I'm curious to know more!