I got a reply to me email inquiry with Aquarium Masters (after sending a photo of my stand that they asked for):
So I'm feeling better, I will still put some 1/4" high density neoprene under the edge.Hello,
If it just a sheet of paper you’ll be fine. The tank will settle slightly once filled. Padding will not be necessary, but if it makes you feel better you can use neoprene or a piece of corrugated cardboard (shipping box rated 175lbs.+).
Nice cabinet, this is how all cabinets should be built.
Thank you for choosing Aquarium Masters.
AM Customer Care