Scared the holy poop out of me when the foster blew off the fill port on the gun. DonnyFL extended Foster, could not find the Oring so used one of the other fosters I have around, but getting them off the crown is the pits for fat old fingers. Picked op some replacement Orings at the Home Dopot and replaced the missing one. Dang now the Donny foster won't fit, what the heck??? Start to investigate why. Guess what I found--- the missing Oring, Where on the guns fill probe, male foster. wehn it blew off, it blew the Oring onto the male foster.
