[wlively]

I built mine without forms, although I used a raisable floor on the top rings. I used HeatStop and found that if I started with the center (directly opposite from the opening) brick and worked outward, when I finished one half the center brick was set enough to not be a problem in continuing the other half. About ring 8, the angle of the bricks and the small size of the rings required a one ring at a time strategy for me. I was being anal and really wanted a good shape and clean face to the dome.