I came across this today and will be tucking it away for future reference. My DD (Darling Daughter) also does pottery (OK, these days it is called "Ceramics"). She has studied it in university whereas I have only studied it in high school, many moons ago (I won't say HOW many).
She's learned about all these different types of firings and we've been keeping this as an option for the future, so now I have some great picture instructions (I'm much better with those, these days)!
So here's my great find for today:
Gas Kiln Trials and Tribulations