I just bought a fill adaptor from the dive shop, i brought my fittings and he made one for me from an old regulator to fill my rifle.It wasn't until i got to about 200 bar that I realized we forgot to put a pressure relief valve on it. now the probe is in the fill port and the tank is full to 225 bar and the scuba tank valve is closed. but no way to release the line pressure. what do i do now? I know, I feel like a complete Idiot. I know better. I dont know how to safely discharge the line to remove the probe from the fill port. please advise.