I have my Amadeus set up on the same platform that my Rega was previously set up on.
It's an Ikea Lack sandwich - light and rigid.
The Lack "Side Table" is on a concrete floor, and another Lack table top (without the legs) is on top of the bottom table.
In between the bottom table and the table top are 4 racket balls (cut in half).
The whole set up cost about $25US.
I think it sounds fine. However, I've never compared it to a birch wood set up.
The cut-in-half racket balls seem kinda wanky, but I haven't found an audiophile-approved "firm but squishy" alternative yet.