Sandbox-style isolation

J Loveys, I did see your pic on line and it did catch my eye. How do you level the table? Did you have a sand box before the Symposium? I have quite a few symposiums in my systen and do like them quite a bit. I wonder how much better it would be than what I currently have (what I have sounds awesome). I also wouldn't want to give up the ability to level, so I wouldn't be direct coupling the plinth to the base, but, rather, keep the table on the feet and have the feet rest on the symposium. I currently don't have any feedback, nothing skips when I walk or jump up and down in the room, and can tap my finger pretty hard on the plinth while a record is spinning and needle is in the groove and there isn't any sound (of the tapping) at all. Appreciate your input.

Dear Cerrot: the Ultra platform is directly on a VPI thick wood platform that has large leveling stainless steel cones , so I level the TT with them. Direct coupling the VPI makes it unsuspended and in this case it is a big improvement sonicaly over the VPI air feet suspension. I have tryed both ways and this is superior. I do use my stetoscope to eliminate any motor rumble, it is quiet, steady and external vibrationproof. A very important thing is to couple the underplatform with the wall with strong angle-iron . There shoudn't be any motion when pushing the platform sideways, especialy with wood floors. The pen tapping test on plinth and platter is dead silent too.
I have not tryed sand platforms but the VPI stand feet are filled with sand, this makes the whole thing about 150 Kg! I am working to replace the acrylic TNT plinth with a slate plinth ,...

Thanks for the feedback, Jloveys. I'll keep an eye on a used ultra platform. Thanks again.

Dgarretson,

No I have not tried that, but will keep it in mind. Very interesting about cutting up the top plate to isolate each component foot.

AFAIK, a sandbox with a segmented top plate is the only platform that can completely isolate all the TT elements from each other, while preserving a fixed, stable geometry between outboard motor, flywheel, and plinth. Any other system will tend to recirculate vibration across the horizontal surface of the platform.