True, this project may not be portable, but that's what I've been looking forward to. I recently snagged a junker of a pickup truck from a scrapper and have been converting the bed into a mobile nerf war reloading station for my team. I installed a small hydraulic press into the side so I could mount the C.S.H.G. to it and slide it in and out of the pickup's side so I could hold off other teams while mine reloaded. If You aren't going to continue with the current design, can you please send me the plans so I can finish my mobile base? If not, I understand.
OKAY, OKAY!! Enough n00b bashing already! One can only take so much abuse and this idea's gotten nearly two pages of nothing but hate. I'll ditch this idea and try something else. And it WILL use scuba tanks. I got two for free and can't pass up an oppurtunity to make the ultimate nerf BMFG. Once I get my next idea drawn up, I'll post it up here. This one may just rival CaptainSlug's heavy gatling (which I'm anxious to see completed). Until then, please be nice. I'm just a beginner, here.
Making several of those would be very costly and time consuming. It might be easier, once he finalizes a model that meets or exceeds expectation, to make the schematics and sell those. Multiple CSHGs would probably cost a fortune just to ship.