Advice for rigidity upgrade. To profile or not?

[Nealieboyee]

It would help with the lateral rigidity, but it wouldn't be as good as a single thicker plate, as the flexing stiffness (in the flat direction) of a plate increases as something like the 3rd power of the thickness. The thing is that stacked flat plates can slide over each other therefore don't increase the stiffness so much. One thing that might work is if you glued the 2mm plates together with high strength epoxy, this would likely also help with damping a bit, but is obviously a bit of a faff to do

I might have some epoxy I can use. I might be able to get a hold of some 4mm plate. Should be a lot better. Did you get my pm?

[Sasquatch]

For vibration damping fill void between table plates with epoxy concrete.
Sharp sand + 10mm gravel 2to1 by volume and 10 % epoxy. Cheapest i could find was in2 epoxy from easy composites.

I have access to solid works within simulation addon.
I could run some simulations for you.