Nerd, I have always fired by the . . . seat of my pants. The glaze loads are fired using a short water smoke of one hr, to make certain all glaze is dry. Then a 70% to red orange heat, then full up to yellow, backing down to 90% til ^5 goes down, backing to 80% for ^6. This usually allows for ^6 45" to 1 hr later. Then I do a cool down at 30% til at red orange. Most of this control happens with the kiln temp color, and even though not rocket science perfect, pretty dang accurate as long as the cones are there. I have had problems in the the distant past with pinholing, color immaturity, and lack of proper crystallization of glazes from too fast a move past ^5 and ^6. So made appropriate adjustments that have worked pretty well.