| Imported post
I think one of the safe guards employed is to have all the stages turned off, the required stage is turned on when required and the reg used.
If you can breathe from it then you should have the one on the correct stage.
I think this is correct but I am sure this procedure will be expanded on when the guys who know come along.
Daz
__________________ Underwater rock juggler extraordinaire 
Breathe in, breathe out. Repeat as necessary |