Been playing around with the S400ERB set at the highest power level.
Only gives me about 30 consistent shots...so I hooked up the scuba cylinder under the table, connected the fill nozzle to the rifle and opened the tap.
Now I have 12L of air at 180 bars for thousands of consistent shots, better than a regulator.
Close the tap, bleed air, disconnect..rifle is full and ready for the hunt.
Works very well with the AA filler with the thin longish hose.
No reason why this should not work with FX2000 and other Webley variants, S200, EV2 etc.