After filling with fluids I'm performing a slow run up with the Benjamin 90 ci bottle.
The build quality appears to be good. It is loud indoors but I think that is expected. I'm incrementing the pressure shutoff up 1000 PSI at a time and so far it is working great. 1500 to 2500 in 3 minutes.
PS I don't know if it cooled off or I have a leak, it is down at 2000 PSI after 10 minutes.
So far it is as I had hoped. Hold my beer, I'm going to 3500.
Another data point.
~2200 to ~4200 PSI exactly 10 minutes, Benjamin 90 CI. The Recharge temperature maximum was 68 but leveled out and ran for the last 5 minutes at 66.5C.
Automatic shutoff at 4200 was close enough, maybe ~100 PSI low if you can trust any of the gauges on these machines and bottles.
The bottle started cold because I accidently discharged it and wasn't even warm when filled, so I doubt I'll see a pressure drop. If warm, what is everybody seeing as a percentage of pressure loss when the bottle cools off after a fill?