There is your answer then...you need ideally the Black Magic on there, if you use just the maxy, you will be running 325 psi into the gun...when you rapid fire, you will drop off as the recharge rate wont be fast enough, so, dont put a gas thru grip on it, use an HP maxy and Keep the black Magic. You need to run about 550 to 600psi into the Vert reg, or the marker simply won't work very well under rapid fire..although I have heard that people use MaxFlows, but Im not convinced of the recharge rate..if it worked better/well then Planet/Nexus would do it (after all, why double reg if you dont need to), but they dont.