From natural gas to propane, what do I need to do?

[AVTrout]

I'm moving my studio from the basement (breathing air quality was a no go even with a fabulous ventilation system) to the garage. It's been about a year and a half since I've been in the studio, and even back when I was, I was a noob at torching. I have a few questions....

1. In the basement I used natural gas, a Carlisle Mini CC and an oxy con.
2. No flashback arrestors - do I need them now? I'm thinking yes.
3. I've read about people putting holes in their walls with copper piping - my plan was to put the tanked propane outside and run the hose through a hole drilled in the board that will be plugging up the side of the window that my ventilation system is hooked up to. Is this idea a no-no?
4. Propane and oxy con regulators - speak to me of them and what I need to get.

At the place where I used to torch they used Carlisle Mini CC's, oxy cons and tanks of propane. She would crack a (notice I said "a") window, twist on the tank, turn on the oxy and off we'd go! No fan, no ventilation. No regulator and no flashbacks. Wow, that was really dangerous.

[Mr. Meker]

You need a propane regulator like this http://www.google.com/products/catal...518&sa=title#p

check craigslist for an acetylene regulator, they are the same thing.

Flashback arrestors- You definitely need a propane one, and depending on your concentrators pressure, one for it too. Sometimes concentrators cant put out enough pressure to break the internal valve. They are cheap protection for a big investment.

Piping- there is a tutorial on here about it, but I cant find it. Somebody else will.