Springs under turntable

Lewm, you have no idea what you are missing. The really good units like My TacT and the Trinnov Amethyst do all their processing at 192 hz 48 bit
It is totally transparent. The power of these units is amazing. You not only get automated room control ( they automatically generate filters that bring each speaker individually to flat) but an incredible subwoofer crossover and bass management. I can independently change the frequency and slope of either the high pass or low pass filter on the fly. I can use slopes up to 10th order. I have dynamic loudness compensation. It changes its corrective slopes automatically with volume. The balance between bass treble and mid range stays exactly the same regardless of volume. I can program filters to adjust frequency response any way I want with 0.5 Hz precision. I can delay individual speakers so the the sound from each hits your ears at exactly the same time. Using this capability I can put the sweet spot anywhere in the room! This capability also matches the subwoofers in phase and time to the satellites. I can hold 9 different frequency response curves in memory and I can switch back and forth on the fly. As an example one has the BBC or Gundry dip programmed in so if things get harsh I activate that curve. All the programming is done on a PC and all the filters and curves are displayed in graph form. Everything that this unit does is done without any distortion. It is invisible. 
Talking about unbelievable differences, if I switch the system to bypass my wife will even ask me what happened. 
Once you use something like this you never look back. Back is the stone age. If you think you do not need it get a calibrated microphone and measurement program and check your system out. 

Yep. I do know what I am missing, and I don't miss it.Even when electronic manipulation of the system response is "transparent" (and I will believe that when I hear it), the subjective impression of the listeners I have been around is that they are not pleased with the SQ, compared to using no equalization on the very same system in the very same room.  Measurements do not coincide with the sense of verisimilitude that is after all what we are all ultimately seeking. I have attended several such demonstrations, and the net impression of other listeners and me is turn off the EQ. On the other hand, in your particular room with your particular equipment, etc, perhaps the results are different; I can hardly say otherwise. You can go your way, and I will go mine.  It would behoove you to recognize more often that you are expressing your opinion based on your own experiences, rather than to speak as if you are presenting the gospel.  This is not to say I don't advocate and implement room tuning to get the SQ I am after.  But I am sure that my room that satisfies me would not measure perfectly flat across the audible spectrum.

@mijostyn- What you stated is exactly the issue that I am facing with springs and it is true for any electronics as it is true for a turntable. For any component, if you want to get the resonance frequency to somewhere below 3 cycles then you are working with a. softer springs in general, b. they are loaded to the max around 97-98% of the spring capacity, c. each spring is carrying the same load. Satisfying these conditions underneath any load let alone a heavy amplifier or a very fastidious turntable is going to be extremely difficult. That's why I keep looking for a tool which gives the CG location of a given component and/or something when attached to a spring shows the load that it's carrying.
Without those tools/guidelines embedded in the product even Minus K or Stacore platforms are not going to be very effective....
Beside this load adjustment issue you have to deal with the type of the platform that hosts the component. You need to make sure that it doesn't adversely impact the tonal balance.
It is because of these issues none of the products or ideas on the isolation currently available in the market provide a plug and play solution, in my opinion....
Thanks.

@lewm   They're way ahead of you!

https://www.bidsquare.com/online-auctions/skinner/studio-brushed-steel-rocking-chair-1416477

twoleftears, 800 volts and 250 amps and you should be in great shape.

Lewm, you and none of those other people obviously have not heard a system like this. I would love to have you over for a quick demonstration and don't forget I am a fellow ESL lover. I am talking everything from Beethoven's early string quartets to Nine Inch Nails. If you think your system images now, I can make it image a lot better. If you think you have decent bass now, I can make Ron Carter materialize in your listening room. Any system you have heard was either set up incorrectly or it was using a sub standard unit without the necessary processing speed or resolution.