DJ and Greg:
I see it now:
This summer (by then i'll have a job and cash to waste on fun projects like this)....we could try to make a very miniture version (still dangerous

..but thats the fun)
You two can do the electrical stuff and i'll do all the mechanical stuff...i can see this being quite easy...hey....maybe we can get some hints or help from Koors (he's the guy with all the cool gadgets and projects

)
........OR..........
I can try to talk to Tino and get the 10ft and ~21ft Spud Guns from his grandparents..and then we can fix them up (i know they wont work joints too weak from sitting around...[we almost killed our selves on the 4th of July when the darn thing exploded...heheh])
Just a thought...