Yes. This is a Manibigama II kiln that has been fired for 36 hours and down
fired for 8 hours. Great results are possible with this method of firing,
but it works best if the temperature is held for about 18+ hours between
C/8 and C/9. Final temperature range is 10 at front and 8 at back. This
is made possible by partially blocking the upper flue in order to force heat
down into the lower rear of the kiln. Without this, you will need to go
to at least 12 in the front to hit 10 - 11 in the back....or lower.
The shelves should be 24" wide and 12" deep; leaving a few inches on each
side. Also, don't tighten up the setting too much. 9" posts or higher
work best. I have also fast fired this kiln (over thirty firings of various
kinds) and it's great for quick ash buildup and very high temperature. It's
just not the result that I am looking for. Good luck.