As suggested above, you will almost certainly need some kind of isolation from a Bags rack. I use a sandbox (made by BrightStar, on a Bags rack) which is cost effective and works reasonbly well, but only raises the height 1 5/8".
How to Increase Turntable Height on High WAF Rack
I am finally getting a turntable for my primary system. My wife really likes the current rack - Billy Bags, 3 shelves, ext dimensions 40 inches wide by 20.5 inches deep by 20.5 inches high. I am getting the new Ayre/DPS and the table will obviously sit on the top of the Billy Bags. As I see it, I believe the table will be at least 7 to 8 inches lower than minimally acceptable. Hoping to get some guidance on what I could use, e.g., wood, granite, etc, to increase the height of the turntable. If it were only up to me, I would just get a new rack but I am trying to accommodate my wife, who has been extremely tolerant of my stereo largesse (sp?). Any suggestions?