How good is the Obsidian plinth of Technics SP10 ?


Recently I heard an SP10 MK2 playing music at a friend's place. It was mounted on the stock Obsidian plinth. It actually sounded very good. I wonder how good is the Obsidian plinth compared to:

1. Typical after market birch ply plinths ?

2. Custom designed plinth like the Panzerholz plinths made by Albert Porter ?

Any ideas ?
pani
Thanks @chakster .

@raulrigas, what are your impressions of driving the SP10 in the naked mode ? Do you advise getting a good plinth ?
As for replacing feels on the stock plinth. Anyone tried magnetiske ones?


I do not want extraneous magnetic forces to be found near the cartridge.