am offering my 4 shelf Isis rack with the Turntable Top. The top shelf is 22X27, for larger turntables. It incorporates internal air cell isolation in addition to constrained damping layers. It is level adjustable, divided into four quadrants, accessible from the bottom of the rack. It provides isolation and damping and is especially good for turntables without an integral suspension.
The Isis rack has 4 shelves (including the Turntable Top), three roller block modules, and an additional base station to handle heavy loads, and couplers for the equipment on 3 shelves The lower 3 shelves are all the standard Isis shelves, and the useable space is 21 x 19. Spacing between shelves as shown is 13" for the top most (under the TT top) and 10" for the two lower shelves, but space between shelves can be altered by +- 2", depending on where the rollerblock modules go (they add 2" to each leg). By using multiple levels of Rollerblocks, Symposium achieves compound isolation--isolation with grounding.
I bought it in May 2011. Since then, I purchased the Rockport table you see (not for sale!) and it has remained in place. I am selling to downsize and because I doubt that the Rockport benefits from this as much as my previous turntable did, which did not have a suspension. I can tell you with that turntable, the results from the Isis rack and Turntable Top were exceptional--it stopped virtually all the footfall problems I was suffering from. Dynamics were also substantially improved. If you're not familiar with the TT Top, think of it as a Symposium Quantum designed to integrate into the Isis rack.
Shipping will be based on actual cost. The rack breaks down into a few separate boxes, so UPS or even USPS is possible.