Framed aquarium and rubber mat

[Fishess]

Hello so i built a plywood stand (Really strong, it has 6 (7 legs if u count back panel) of 0.7 inches (1.8Cm) plywood..
Here's my question:
Lets say after leveling surface of the stand, so it's all level and even..(As much as i can)
There are 0.05 inches (~2mm) small bumps or imperfections on stand surface.
Is it worth ussing rubber mat under framed, rimmed aquarium? To level all the imperfections out?
(Or to be extra safe from aquarium cracking)
Under the tank it self, there will be thin plywood, then the rubber (standart aquarium mat)..
The aquarium is juwel lido 120 <<<<
Example shown in image:

 

[hmmmmm]

If it's just 1 or 2 mm, why not sand out the bumps? Get a straight piece of wood, wrap some sandpaper around it and block it out.

 

[Fishess]

I did that.. At first i spent aroung 3 hrs.. with sander ( machine that vibrates with sandpapper under it..) Then i used steel leveller tool that i wraped in sand paper and whent from one side to other side of the stand.. Still there maybe be some imperfections thats why i want to use the mat + thin plywood under the tank it self would that help?