Great! I went looking for that but didn't find it. I had read it before. I'm glad you found it and posted it. I think one of the things that makes it work so well for them is that there are no big trees shading the beds. They get 100% sun on their beds. Given the right conditions solarization can sterilize the soil 12" deep or more.
Rick did tell me that they pull some of the plastic earlier to plant their new plants that they have ordered as they come in.