The Walker/Technics test seems like it was one front end versus another front end and the group preferred one over the other. How is that invalid? They were not comparing arm vs. arm, or cart vs. cart, or table vs, table which would have been very difficult or impossible. I haven't read anything about the cables or phono amps used. The only conclusion I can draw from that test is that during those sessions, that group of experienced music lovers preferred one front end over the other. I don't even think it would be correct to deduce that the drive systems (DD vs belt) made the most difference in the test.
It would be interesting to hear from more people who have tried their DD tables with a solid plinth and then without one.
It would be interesting to hear from more people who have tried their DD tables with a solid plinth and then without one.