Hi Denise~
Since I've not done what you're inquiring about, I'm not sure how to answer; I do recall reading, though (I believe in the "Safety" Section) LOTS of information on this very same question. I did a Forum Search in Safety, typing in "regulator inside" in the Search Box and here are the threads that popped up:
http://www.lampworketc.com/forums/se...archid=4239950
I'm sure your answer is in there!
Alternatively, you could post the question specifically in the Safety Section and I'm sure one or all of the safety guys will help you out!
Good luck!
De