I really like my Duncan Teacher Plus. Question: For bisque and glaze firing, I start the switch at the 10:00 position, even though no markings are there. I turn the switch to 8:00 position two hours later, 6:00 position two hours later, etc. I keep the toggle at Low Manual. My witness cones from the top, middle and bottom shelves are all the same. Sometimes I do a drop hold on a glaze firing to heal pinholes. Do any of you have a better firing schedule?