I just finished curing my Primavera 70 oven. It took 6 days and lots of hours but it was worth it. I have chronicled each day of the curing process in my blog. I am not sure if it is okay to link to my blog from this forum, but I thought it would be helpful for other newbies to see how to cure the oven. Each day is broken out by a separate entry in the blog. I used the 6 day curing process starting at 300 degrees and ending on day 6 at 800 degrees. The oven cured beautifully with only a slight hairline crack on the exterior that does not go through.
I hope this chronicle of my 6 days curing the oven will be helpful.