Thanks, you've got a great like kiln there...makes me think.
"Small is beautiful".....
This little kiln which originally was an electric test kiln which I built while living in Japan, holds 8 chawan and a few guinomi, and affords me the ability to check out glazes and temps/atmospheres quite quickly. I fire it in 10 - 12 hour firings at a cost of about $5-$8 per firing. Depending on the shelf configuration, one can create chawan which have a very well define shomen if one chooses to do so, as it is possible to create micro climates within the kiln which are then recorded by the work.
Yoshida Akira of Shichiringama fame is a Japanese potter who has done a fair amount of work developing and firing micro kilns and may have a book out (probably Japanese only at this point) on the subject.