Turntable isolation platforms


Need some reco's on turntable isolation platforms.  Currently I'm considering the isoacoustics delos.  This is another step in the battle to reduce acoustic feedback (see previous posts of mine).  I currently have TT  on a  Pangea audio rack with a rumble filter with iso feet but want to remove rumble filter and use XLR input and not RCA. All ideas are welcome for a solid platform.  GO!
polkalover
Why do you need one? Do you really need one? 
I needed one as my TT was on a simple table that flexed. I had (20mm thick) piece of granite made, plonked it on the table and my TT onto it. Was good enough for me.
All great thoughts on this universal challenge we often have in our listening rooms.  I am on wood floors and conventional foundations so when my 20lb dog would walk through the house I could feel each step in my listening position.....crazy!  I moved to a wall shelf but now have the same issue polkalover mentions.  When I lower the arm, sometimes I get an immediate bass tone from the speakers.  I didn't think of applying downward pressure, but instead applied slight upward pressure like I was going to pick up my turntable but didn't actually lift off the shelf.  It immediately stops the rumble/tone.  There hasn't been much comment here on the Delos or any of their Orea feet.  These are somewhat reasonable in price.  I am looking at either 3 of the Bronze feet or the Delos 1.75in thick platform.  This is $150 vs $400.  I will call tomorrow and see how these feet of the platform compare to the Orea.  This isn't explained in the technical details, but I would imagine it is the same design.  I may order both and simply keep my preference.  The farther I go with improving my system the more weaknesses are revealed.  It is so much fun and challenging....god I love this hobby!!!  
I had acoustic feedback with my Kuzma Stabi R Tt sitting on a HRS R1X platform (on an Usher Audio Rack on suspended wood floors).  I called HRS and they suggested that I get low frequency replacement feet. Cost me around $500 for the feet and it did the job.  
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