I use the time of day plan with my electric company (I get charged a lower rate during lower demand periods, which includes the weekends) and I am assuming that the 8 hour hold at 200 degrees is to fully dry the investment block so as not to get steam bubbles. I am hoping I can do that ramp to 200 and hold for 8 hours as a separate step prior to adding the glass and sides, and then just ramp from room temp at 100 degrees an hour until I get to bubble soak at 1225.
Just trying to fit this into the 9pm Friday to 5am Monday window for lower cost electric. Once it gets down to 250 degrees, it won't need much power to keep the ramp down at 41 degrees an hour. Oh, and I live in the desert, so the investment block isn't going to pick up a lot of moisture from the air if there is any concern about that.