Yes. What is your question. In general I use it out of habit but really don't think it makes a major difference in sound
If you check the website of Mapleshade Records or Machina Dynamica then the holistic approach to optimizing CD playback is presented. No single action or gadget does everything, but even one product can make an audible difference. The "jaw dropping" magnitude of benefit most easily heard when a number of ideas are combined.
A bit time consuming to achieve, but rewarding.
Yes, that's correct. In fact, a maker of Schumann devices suggested I try this. And he was right. You might want to give it a try yourself. I just put one side on top of the Schumann -- either side. But I will try both sides to see if this makes a difference. To do the A/B with the Acoustic Revive I used 2 copies of the same CD. No contest in favor of the Schumann.
I have 2 kinds of Schumanns. The SW1 used to be sold on Audiogon. I have 6. The second is a version of Schumanns with the Chartres coil. I have 2 of an earlier model and 2 of the latest model. I may start to market them. So, I don't want to give away too much at this point.