Haven't used Arctic Fox, so can't help with that. But I remember seeing that you can adjust the tension of the button by removing the battery and accessing the behind the button by unscrewing a couple of screws in the battery chamber, I believe. Maybe this'll allow you to get there.One of my P80s has a little gunk on the inside of the transparent firing panel, obscuring part of the display. Is there any way to take that panel off to clean the underside?