Sure carbon fiber tank regulated to 800psi would work.Ordered two eleven inch air tube extensions from Mac1 today, but he is out of the bulk fill caps. Why couldn't I just install a foster valve in my existing cap? It's already drilled and the fosters have a threaded end so it should be pretty straightforward if I knew which size valve to order. Tim is pretty adamant that you should only use CO2 in bulk fill conversions. He says you can't compress enough air to give consistency in non-regulated guns. I think the regulated guns are rocking 250 BAR or 3600 PSI. A 12 gram CO2 cartridge, on the other hand, puts out about 1000 psi, but it does it over and over as the liquid gasifies so you get the benefit of high volume from a small source. You mentioned your tube is about 50cc and you fill to 1400 psi. Guess I could pick up a scuba tank and have it filled at a paint gun fill station instead of using a compressor. Your route would be a lot cheaper and less hassle. Now that I've thought it through, it might have made more sense to design a carbon fiber tank into the forearm instead of going the extension tube route. Been here before on similar projects like motorcycle engine swaps and trying to convert HVAC to split minis after a hurricane took out my ductwork. It's always easier in the concept phase!
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