Just wondering if you are at all worried about the back and front (long sides) edges of the tanks aren't supported by the stand, just by 2 sides.
I'm just not sure if the lack of support would cause any twisting at all on the tank seams. Although a couple of my LFS has wooden racks only supporting the left and right edges as well, and they are 20 gallon tanks, and so far no problems with them doing so.
I'd be just a little paranoid and at least use a sheet of plywood across the top of the stand, to sort of help distribute the weight. You could use a razor blade to remove the blue paint if you wanted to change the look.