Yes, I was offered a 2300 or 2400 psi N2 cylinder and went with that.
If i am reading that first full colour graph correctly, a 3/8" line can flow 20 CFM, but a 1/4" line only 10 CFM, so my 3/8" line with 1/4" fittings is likely a bit above 10 CFM capability. That's good.
I did post a question...