Only thing is, can the pneumatics handle propane? I'd think they would, but I've never tried it or heard of anyone trying it.
I was thinking it'd be cool to run the parts off of the compression piston, but I don't know if there's enough pressure for a long enough time to make it work. Kind of like the idea of tapping a barrel to power pneumatics that someone suggested below...
We'll see. I hope they do something crazy and original to make the semi version work.
