The other option is to buy from Expert HPA or JDS and get any reg pressure from 800 PSI to 2000 PSI as shipped. Check with them but I believe they test 100%. I keep my QB regs under 1250 PSI and I think Rich stays under 1100 PSI and we can both measure reg output. Not that much more expensive if you factor in your time and the possibility of making a catastrophic mistake and over stressing the gas tube with too much pressure. Without the right equipment, you don't know what the reg output is and may be putting yourself and others at risk.
Just my 2 cents