If the studio floor connects to, for example, the showroom, then a level solution is the most attractive. In that case, a hole must be made in the concrete. In new construction, you can take this into account and only pour the space after the turntable or the concrete pouring ring has been placed. Our preference is to first place the ring, then pour the concrete, and finally install the turntable. Otherwise, concrete may end up underneath the turntable, which is not desirable.
The simplest solution is to place moisture-resistant MDF on a flat, stable floor. Then we cut out the circle and place the turntable in the center. If the motor unit also needs to be recessed below the surface, it will have to be cut out. This can be a bit of a job, but it is better to cut out only the motor unit partially than the full 25m² of the turntable.