the time the pressure release valve blew on me was because I had opened up the co2 bottle too much. I basically just turned it all the way open, and a day later, sounded like a tea kettle.
Now, I only just barely crack the tank open
While it's a good idea to not open the cylinder quickly, the same amount of pressure is going to make it to the regulator if it's just cracked open or you've got the thing wide open. The tank open/close valve doesn't regulate pressure.
I just wanted to clarify that.