Hi Henry
The Exclusive P3 is superb. It certainly has never had any feedback problems, so I am not sure where that comment came from.
The P3 has very sophisticated triple isolation (oil-damping + spring + rubber) which is isolated from the plinth. Isolation is down to 5hz. The motor structure and tonearm are on the same plane.
So, why would I want to remove the "decoration" plinth? It looks classy, sophisticated and timeless , yet like most plinths does not effect the sound quality or isolation abilities.
The Japanese engineers spent a lot of R&D on the P3 and it shows. I am sorry if you think anyone in their right mind would try to disassemble it. A tonearm rewire would be beneficial thou.
It was the most successful high-end & high-priced turntable in Japan for good reason.