Jim, think about my set-up on a smaller scale. Tile...hmm? I’d go with the rubber/cork isolators easily found on the cheap from HVAC vendors. I use the 3" square ones. Then a piece of MDF (painted to please the War Dept.) then your springs to mate with your DIY platform. This way you will be decoupling from the floor without damaging it. Simple, easy. OK,...I’m done here.
