Kinda wondering what’s wrong with the springs? I have a modded Dual 1229 with a Grace 747 tonearm and love the spring suspension. Having hardwood floors they absorb any foot fall vibration. When I used to use an LP12, I couldn’t walk across the room without causing stylus jump. It’s an old technique, but a really well executed.
At one time I had a nice heavy hardwood plinth made for the Dual (still have it somewhere), and tried using it without the springs like I do on my Garrard 301. I didn’t like it. It also seemed to kill the lively sound of the turntable. I refinished the stock plinth and reinstalled the springs.
Norman