Method Have a couple things I would like to clear up- inert gas

[bluebus]

I apologize if this has been asked/ answered before. I am new here, but I have done lots of research as well as lots of scrolling through this site. I intended to use nitrogen as my method. I have bought the regulator, tubing, and tomorrow I am getting the nitrogen. I really don't like the idea of having a bag around my head (I'll chalk it up to my mild claustrophobia) so I was really leaning towards a mask. If anyone has seen Jerry Hunt's website, he uses a plain old dust mask with a shellac sprayed inside to "block outside air from coming in", in his words. I've used those masks before while working and while they do fit well, they are not complexity air tight. He cuts a hole in this mask, slips a tube inside, and attaches it to a cylinder of helium. That's it. And he was successful. I see many people using scuba masks/ cpap masks, and while those are obviously pretty reliable and predictable, even those feel a bit too bulky and constricting for me. Anyway, I was really just wondering if a simple non rebreather mask (one you would buy on an Amazon) could work. I have one that I ordered and forms a good tight seal on my face. There is a tiny but of open space where it sits on my chin (I have a relatively small head so that's understandable) but it's not enough for me to fit a finger or even a pencil. I know that for the exit bag method it's important to leave a little space so that carbon dioxide can escape. Obviously that means that the bag is not creating a complexity airtight seal. Here's my confusion: If an exit bag is the "ideal" set up for the inert gas method, and it is not completely air tight by design, then what difference would it make if a mask was not completely air tight. I'm sorry for the long drawn out way of phrasing this question. I was trying to make it as clear as possible so that no one would misinterpret what I am asking, but I hoesnlty seem to have made a mess of the whole thing. If anyone has any answers I would greatly appreciate it. I am terrified of a failed attempt.

 

[socrates]

What kind of regulator did you get?

 

[bluebus]

CO2/Argon Flow Gauge Regulator
It is a CGA 580 fitting so it will work with a nitrogen cylinder, I already checked