Zen, here's a link to a good bonsai potter's web site.
http://www.langbonsai.com/
Ron is very good -- He is local to me and I've been using his pots for many years now. A few years ago, he built his own wood fired kiln. His work has gone from good to amazing since he built the large kiln. He works with huge pots now with sophisticated glazes. The "Technical Information" link on the left hand side of the page will take you to detailed slide shows of making a big bonsai pot and to a step by step in how he built the kiln.
By the way, Dale C. has posted photos of his kiln set up here, I think. They will turn up in searches.
Anyway, thought this might give you some ideas.