Turntable isolation platforms

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.  

Look at my system page, and derive an idea from that