I agree that isolation from all vibration is paramount. Some manufacturers, Rega for example, goes with light, and low resonant materials. Other manufacturers go with massive platters and other suspension cures. I could simply sell my Michell and try one of the other options. Instead, I've been working for some time to figure out how to isolate my TT from external vibration and to minimize the effects of resonant frequencies within the the TT itself. Removing the spring and using the lattice bridgework castlenut system Peter designed helped immensely on the internal sources of vibration.

In addition to that replaced suspension, I use an acyrlic toroid under my armboard, separated by 1/16" large washer of Herbie's Audio Grungebuster, a platinum curried silicone material that is terrific at absorbing vibration. The entire armboard-toroid system is mounted on hard rubber spacers too, to isolate the tonearm from the chassis, using also a 1/16" small washer of Grungebuster to interface with the toroid. The turntable sits on a 4" thick maple block. But under each of the three Michell feet I have a 1" diameter turned brass lamp shade ring (LSR) into which is a 1" diameter disc of 1/8" thick Grungebuster. I use Grungebuster with an adhesive side and that side is up into the LSR so that the finished side would be down on the shelf. Since the LSR has a hole in the center, the adhesive side of the Grungebuster is exposed. The Michell sits on that adhesive bit, finished side of Grungebuster on the shelf, and the Michell feet do not touch the LSR, making the TT completely stable from movement on the maple block.

For outside of the TT, I have my turntable mounted on a 4" thick Mapleshade Samson maple block. That block is supported by three particle dampers. All of that is on yet another thick maple shelf. I can tap on the lower shelf and nothing comes through my TT. I can rap on the 4" thick maple block and it does not pass through.

All of this has incrementally added to a very low external and internal vibration control of the TT. While still not perfect, folks who hear it in my house say they have never heard a system that sounded that good. When I play vinyl, folks are astonished that I'm playing a vinyl record because it is so quite, the detail is awesome and the soundstage is terrific.

So Peter in my humble opinion has advanced the discussion on how to solve a rather serious design flaw built into the Michell GryoDec. SME uses a somewhat similar approach to thwart vibration issues in their products. SolidAir has a completing product, and I would expect them to attack Peter's design simply to protect their own niche. Michell is not going to adopt Peter's solution because of "not-invented-here" syndrome, and the fact that to do so now, means that they have no better ideas but to adopt what someone else has done. Gert Petersen has a solution too.

So I applaud Peter for his tireless work toward making the GyroDec a better turntable. And I look forward to seeing what the next generation of designers come up with for the final cure.