The Air Arms S510 Ultimate Sporter XS: The Ultimate Hunting Airgun

Does anyone know what power it will generate at each of the 3 lower power setting in .22? I know from Steve's video that it's 45 shots at 32 fpe at full power. Comes standard with sling studs and m-lok rail for mounting a bipod. Sweet! Anyone how it does on noise? Is the "fixed" moderator removable if you need something quieter? What the history is on their in-house regulator and magazines?
 
I have the .22 unregulated version and on lower power settings it is very quiet. With the power knob at about 25%, my rifle shoots 13.43gr pellets at about 600fps. I easily get 6 magazines between fills with that combination and with the Q-Tec LDC, you can barely hear it. On full power, it is definitely louder, but still quieter than any of my springers. The magazine and loading mechanism have been flawless in over a year of shooting.