I’m not sure what base is optimal, if it matters. I use an isolation base, but wood is very popular and acrylic or acetal might be OK.
I posted a picture of the P10 bearing here.
It’s incredible, compared to mine which is more expensive and made by a specialist engineering company with $millions of machining equipment. My own deck is a bit of a tribute to Rega as it uses a similar sub-plinth mounting (but with two motors) with Rega belts and Rega arm mounts. It uses the same Premotec motors as in an LP12 as they are very quiet, easy to replace and not that expensive (about $120 each).
Rega’s extremely lightweight construction is because it is effectively an extremely rigid anti-vibration device.