When I added the Pro USB to my Cascade I had to remove one of the Blank Modules to install it. I happened to set the Blank Module on a flat, glass cabinet top. When I went to pick the Blank Module up it stuck to the cabinet top… I thought, “had I spilled something on the top?”. Nope, the bottom of the Blank Module is so perfectly flat that air pressure was holding it onto the top!
I even checked it, as best could, against a gauge block… yup it is perfectly flat.
Kudos to the MSB manufacturing team… great work guys!
Dan