Alright, thanks for all the help guys. Still debating whether I just want to shop to do it. I've burned more than 9 lives already and if another accident doesn't do me in, my wife might. Nevertheless, I've bled the tank including valve-down and finally, burned off all I can. Not sure what you call it - the spring action "plunger" pin on the outlet of the valve so the cylinder only bleeds with the pin depressed or a regulator connected to the cylinder - how do you deal with that, if you want to water or otherwise purge the tank? Is the only way to do this to carefully unscrew and remove the entire valve assembly at this point?