Saint- I think Myles Astor used the SRA; you might write to him- on the HRS, there must be some folks who use their big rack in their systems, based on a search you could write to them. You are thinking about this stuff for your Lamm gear and digital front end? I have a large HRS platform under my turntable, but it is less about isolation and more about having a large, stable platform to hold a heavy, high mass table and arm set-up that has no plinth of its own.
When I had the L2 line stage, I used Grand Prix Monaco as a rack, and used various things to damp the resonance of the chassis, including the small HRS 'plates.' You might also look at what a number of people are doing to bypass fancy 'isolation' racks and use simpler heavy duty shelving or platforms (not even 'audiophile approved'), along with free standing (not tied to a rack) decouplers like Stillpoints. But, you have to experiment. The Stillpoints and other decouplers, while effective, are not a panacea- any of these things that are effective also change the tone and character of the sound. Good luck.
