Inna, I currently have a Symposium Audio Segue ISO shelf under my Ace Spacedeck. The manual states that sorbothane footers are a no-no with this particular shelf, so I bypassed them by placing the motor and table on shaft collars that I got off the internet. There is a review on PositiveFeedback.com of this product from earlier this year that uses a Spacedeck that details this. This is ultimately what sold me on the product as I was also looking at the SRA unit. My shaft collars are black, so you can't really even tell they're not stock. My experiences mirror that of the reviewer. The ISO shelf has done nothing but good things to my sound, more clarity and insight being the most apparent changes. I'm very happy with it.