I do know about what temperature I am firing at. It is NOT out by 20
degrees, that has been established.

I have done only 40 firings (including bisque) with this kiln, so it still
is taking some getting used to.

Even in that last kiln, I had a couple of pieces turn out really great. The
clue is to figure out where I can fire so ALL (or almost all) the pieces
turn out lovely. I don't use just one glaze, so my milage varies
accordingly. The piece that bubbled the most was a combination I was trying
for the first time.

I'm sorry, Donna, but the people I know here who have electric kilns of
varying sizes never use cones and they produce beautiful sculptures and
crockery and you name it. If they can manage without cones, I am not going
to stand on my head and run around Europe to try to find some - I will try
their suggestions about temperature increases first. Even if my thermostat
is slightly off, it will always be off by the same amount or percent, so
that I will refire at 5 degrees more, then 10 degrees more.

Keep smiling.

Marianne