Why does the OP have to say things like this:
"Yes roxy54, and now you see how amazing one seemingly minor little tweak can be, imagine that times a few hundred. Or thousand. Then you will begin to understand where my grand depictions of what I’m hearing are coming from."?
The screw theory has been out there for many years and most responses have been maybe you can hear a difference at best, and a lot of people, can't hear any difference. Changing screws will not change your speakers SQ much if at all.
I know this is a audio budget post, but if you really want to do something to isolate your speakers from the floor, don't go cheap with springs. If you want to go cheap, look at the Herbie's audio lab products, if you want better, try the isoacoustics or stillpoint isolation feet. If you want the best, adapt the Magico mpods to your speakers, but the mpods cost more than your speakers.
If you want to improve the SQ of your speakers, skip the changing screws theory and get some good isolation feet and change the internal wiring of your speakers, both of these tweaks will net you a bigger jump in performance.
As good as these tweaks are, your speakers are still going to sound like a tekton, just more expensive. Not sure if the expense would be worth it. I'm sure you will feel differently