Wow, Quality machine!
I've used for 3 months and is an easy user friendly machine. After getting over the initial fear of mistakes, and into the rhythm of how the machine works, it is so easy to use! The machine, with it's built in algorithms, knowing it's drying times, are almost spot on, occasionally needing to add more during time. I got the industrial vac pump, and the long ss vac tube, with 90°elbows .
4 tray is the most useful because it has the spacing between trays for expansion foods like candy, the 7 tray has only1" between trays, and is perfect for foods that are sliced or pureed. The 8x20" trays are huge! 7 of them side by side all most covers a 2'x4' table!
Stay Fresh customer service is how to do business, thank you.