[Chappy]

Buddy of mine picked up a cheap shutter that I'm fixing up for him. He'll be uising it on CO2, and wants to "rip" with it, so I figure I'll reg it for him and lower the pressure to try and limit shootdown from pressure drop. What kind of operating pressures can I expect to get decent preformance with this? And what's a half decent cheap reg that'll acheive such?

Thanks.