I'll be honest, I don't know much about CO2, BUT would this be able to screw into Miller Tap-a-draft system, rather than using the 16g CO2 cartridges?
http://www.walmart.com/ip/Pure-Energy-CO2-Tank-With-Repeater/5439038
The 16g CO2 cartridges are salty, at $10.00, even at Wally world!