The Hawkagama...this kiln was my first anagama. Constructed of castable 12" thick...you could put your cheek up to the kiln wall at top temperature. The draw-back...it did drop chunks here and there...enough to nudge me in the direction of a firebrick-lining for the next one. The Hawkagama was 30 cubic feet in stacking...fired in a day and a half with 1.5 chords of wood. This kiln yielded some amazing results.. I miss this kiln and am tempted to build another...quick turn around time, less prep regarding wood, 500# of clay fills it...just a great kiln and I would be happy to share the plans and rules of thumb for the design of this kiln with any interested parties.