IT WORKS!!!
I'm using the non-adjustable (2,200 psi) regulator, a 500 cc carbon fiber tank, a paintball whip with a slip vent. I also have a bigger than stock, 380 cc tank on my escape. The 500 cc tank was filled to 4,000 psi and hooked everything up, opened the valve and it topped off the Escape to about 2,100 psi (according to the gauge on the Escape). I took 35 shots and the 500 cc tank went from 4,000 to 3,000 psi, so I'm guessing that with a 300 bar fill I'd get 60-70 shots before going off the regulator. Total investment around $200 (not counting the bigger tank on the Escape).
Oh, and did I mention that I'm shooting NSA 24.8 gr slugs? Pressure at the rifle's tank stayed right around 2,000 to 2,100 psi. This will work perfectly for what I want to do.
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