Agreed, the rim-drive motor/flywheel assembly and the TT plinth should rest on one slab in order to fix the geometry between the two. Any play between the motor/flywheel assembly & the platter will compromise speed stability.
You could fix things and preserve the benefits of decoupling from earth via the Cloud platform, by elevating an oversized wood or slate slab on top of your existing Cloud base. Slate would do the best job of absorbing motor vibration. Cones could be used for elevation, or perhaps the new slab could simply replace the top of the Cloud.
You could fix things and preserve the benefits of decoupling from earth via the Cloud platform, by elevating an oversized wood or slate slab on top of your existing Cloud base. Slate would do the best job of absorbing motor vibration. Cones could be used for elevation, or perhaps the new slab could simply replace the top of the Cloud.